Internal linking is one of the most powerful (and most misunderstood) levers in organic search. Done well, it helps Google understand what your website is about, improves navigation for visitors, distributes internal PageRank intelligently and boosts the visibility of your strategic pages.
Done badly, it has the opposite effect: semantic confusion, orphan pages, lost link juice and weaker performance.
Among the existing approaches, the silo structure has become a reference model in SEO. But you still need to understand what it really means, how to use it and, above all, when it makes sense.
What is a silo structure in internal linking?
Before talking about silos, advanced strategy or SEO optimisation, it is essential to understand what internal linking covers and why it is a structural foundation of every high-performing website. Too often seen as simply adding links to a text, internal linking is in fact a strategic element, sitting at the crossroads of SEO, usability and the user journey.
Definition of internal linking
Internal linking refers to all the internal links that connect the pages of a single website to one another. Each hyperlink lets a visitor move from one web page to another, discover related content, find complementary information or dig deeper into a specific topic.
But its role does not stop at the user: these links are also followed by search engine crawlers, which use them to explore, understand and index the pages of the site.
From an SEO point of view, each internal link passes on a share of value (often called PageRank or link juice) to the destination page. That distribution is not neutral: it directly influences how your pages rank in search results. A page that is heavily linked to within your site is seen as more important, more popular and more worthy of attention by Google.
Internal linking is therefore a major technical and structural lever of organic search. It makes indexing easier, improves the accessibility of your content, avoids orphan pages and broken links, and lets you deliberately direct internal popularity towards strategic pages, such as a category page, a key article or a commercial landing page.
Well thought out, it also improves the visitor’s experience. Someone who easily finds what they are looking for, who can click on relevant links and follow a logical path, spends more time on the site, views more pages and shows better engagement.
Conversely, poorly structured internal linking creates frustration, increases the bounce rate and harms the overall performance of the site.
What is a silo in SEO?
A silo in SEO is a thematic organisation of content. The idea is to structure a site into large, coherent groups, each dedicated to one main topic or one specific search intent. Each silo gathers pages that deal with the same subject, at different levels of depth, and that link to one another logically.
In practice, a silo is often organised around a pillar page, which covers a subject in a global and complete way, then secondary pages (blog posts, category pages, specific content) that go deeper into sub-topics. These pages are strongly linked to each other, while links to other silos are limited, controlled or put in context.
This approach has several goals. First, it makes it easier for the search engine to understand the semantic structure of the site. By analysing links, anchor texts and the thematic proximity of pages, Google identifies coherent groups and can associate the site with clear expertise on a given subject.
This is essential in the era of semantic search and AI applied to SEO, where algorithms try to understand overall topics rather than isolated keywords.
Next, a silo lets you concentrate SEO value on strategic pages. By organising the flow of link juice intelligently, you strengthen the authority of important pages and improve their ability to rank for competitive queries.
Finally, this organisation makes navigation easier for the user, who naturally discovers related content without getting lost in a confusing site structure.
Classic internal linking vs silo internal linking
In classic internal linking, links are often added as you go. One article links to another because a keyword appears in the text, a product page links to some vaguely related content, with no real overall thinking. This approach can work on a small scale, but it quickly shows its limits on large or growing sites.
Silo linking, by contrast, rests on a thought-through internal linking strategy. Every link is inserted for a precise reason: to strengthen a target page, guide the visitor along their journey, support a search intent or consolidate the overall structure of the site. The link is no longer an opportunistic extra, but an SEO steering tool.
The aim is not to reduce the number of links, nor to create an artificial or rigid structure. The aim is to make links relevant, natural and useful, for users and robots alike. Good silo linking respects the editorial logic of the content, fits smoothly into the text, uses descriptive anchors, and points to pages that genuinely complement each other.
Strategically, this approach lets you optimise internal linking without harming usability, avoid classic mistakes such as diluting link juice or semantic cannibalisation, and build a durable SEO architecture.
It is this ability to combine SEO, user experience and editorial consistency that makes silo internal linking a powerful model, still widely used and recommended by SEO agencies today.
Why silo linking is a powerful SEO lever
Silo internal linking is not just one good practice among others: it is a structuring lever for organic search. It works on several levels at once: semantic understanding by Google, distribution of SEO value, a better browsing experience and overall site performance.
It is precisely this ability to work on several fronts that keeps the model as relevant as ever.
Helping Google understand what your site is about
Search engines do not read a site the way a visitor does. They analyse signals, compare relationships between pages and try to work out whether a site covers a subject superficially… or in depth. A well-built silo sends a strong, consistent signal: this site is organised around a clear, well-mastered topic.
When the pages of your site connect around one main subject, with relevant links and consistent anchor texts, Google understands the editorial logic more easily. It identifies a hierarchy, levels of depth and, above all, a dominant search intent.
This organisation makes semantic analysis easier and reinforces the site’s credibility on a given topic.
This has become central with the rise of artificial intelligence applied to SEO. Algorithms no longer just count keywords: they assess the overall structure, the consistency between pieces of content and the site’s ability to cover a subject from several angles.
Silo linking, close to the semantic cocoon or the topic cluster, fits this modern logic perfectly.
Take a common example: a site about digital marketing. If it links its content intelligently around SEO, advertising, analytics and conversion, while avoiding pointless links between unrelated topics, it helps Google identify distinct but complementary areas of expertise.
The result: better understanding, more efficient indexing and more stable rankings over time.
Concentrating internal PageRank on key pages
Another major advantage of silo linking is how it distributes internal PageRank. Contrary to a common belief, not every page on a site receives the same SEO value. Internal links play an essential role in how that value is distributed.
In a classic structure, link juice is often scattered: secondary pages link to content that is not strategic, links are added without any overall thinking, and SEO value gets diluted. Silo linking, on the other hand, lets you deliberately direct that value to key pages: a pillar page, a category page, a landing page or a piece of content with high business potential.
This logic relies on a thought-through set-up in which every internal link has a precise function. Secondary pages support the main page, reinforce its importance in Google’s eyes and increase its ability to rank for competitive queries. This is a genuine internal linking strategy, not a mere pile of links.
This model is particularly effective on sites with a large volume of content, such as a blog, an ecommerce site or an editorial site. By concentrating internal PageRank, you improve the visibility of strategic pages without relying solely on external links. It is a lasting SEO advantage, often underestimated but decisive in competitive markets.
Improving overall site performance
Good internal linking improves:
- time spent on the site,
- smooth navigation,
- the bounce rate,
- the conversion rate.
Silo linking does not only benefit search engines: it also directly improves overall site performance from the user’s point of view. A clear, logical and consistent structure makes navigation easier, reduces friction and improves engagement.
A visitor landing on a page finds related content more easily, can move naturally from one topic to another and discovers useful information without effort. This smooth navigation increases the time spent on the site, lowers the bounce rate and helps people understand the offer or service better.
From a marketing point of view, this effect is far from trivial. An engaged visitor is more likely to view several pages, discover a new offer, sign up or convert. Silo linking then becomes an indirect conversion lever, by improving the usability and accessibility of your content.
Finally, these positive user behaviours send quality signals to search engines. Pages viewed, a logical journey, a low bounce rate: all indicators that reinforce the perceived quality of the site. Silo internal linking therefore acts as an overall improvement factor, for SEO, UX and business alike.
In short, silo linking is powerful because it works simultaneously on semantic understanding, the distribution of SEO value and the user experience. It is this cross-cutting approach (technical, editorial and strategic) that makes it a model still used by SEO agencies and recommended in audits of high-stakes sites.
The different types of SEO silo
When we talk about silo internal linking, it is important to understand that there is not one single model, but several types of silo, suited to different contexts and goals. The right choice depends on the site, its history, its current structure and the SEO strategy in place.
Understanding these differences lets you optimise your internal linking realistically and effectively, without creating unnecessary constraints.
The physical silo (site structure)
The physical silo is based on URL structure and the site structure. Here, the thematic organisation is visible directly in the URL paths, which makes it easier to read for both the search engine and the visitor. This model is often found on new or recently redesigned sites, where the structure was planned from the start.
A classic example is to group all the pages linked to one topic under the same directory: a main page, then more specific sub-pages. This organisation makes the structure more accessible, more readable and consistent from an SEO point of view. It also helps direct traffic naturally to deeper pages while keeping a clear hierarchy.
However, this type of silo needs particular care when implemented. On an existing site, changing the structure can mean redirects, updating internal links and even a temporary impact on SEO if badly managed.
That is why the physical silo is mainly recommended during a website redesign or a new website build, when the desired structure can be defined cleanly from the outset.
When well designed, this model brings real added value: better thematic understanding, easier navigation and a solid base for a long-term SEO strategy. But it remains more rigid and harder to adjust over time.
The semantic silo (linking)
The semantic silo relies mainly on internal links, regardless of the URL structure. In other words, even if the pages are scattered across the site structure, it is the links that create the thematic logic. It is today the most widely used linking model, because it adapts easily to sites that are already live.
In this approach, pages dealing with the same subject connect to each other coherently. A main page points to more specific content, and that content in turn points back to the main page or to other pages in the same silo. The search engine then analyses this link structure to understand the dominant topic, even if the URLs do not reflect it directly.
This model is particularly effective in a changing digital marketing context, where new content is published regularly. It lets you slot a new page into an existing silo without a heavy redesign, simply by adjusting internal links and anchors.
It is also a very good fit for modern search and AI-driven SEO, which favour overall semantic consistency over a purely technical structure.
The semantic silo is therefore a flexible solution, making continuous optimisation of the site and adaptation to new search intents easier. It is often the best option for optimising your internal linking on an established site.
Strict silo vs flexible silo
Beyond the type of silo chosen, another essential distinction concerns the level of compartmentalisation. People often contrast the strict silo with the flexible silo, two approaches that follow different logics.
A strict silo strongly limits links between topics. Each page links almost only to pages in its own silo. This approach may look ideal in theory, but it carries risks. By compartmentalising too much, you can isolate important pages, slow the flow of link juice and harm the visitor’s browsing experience.
The flexible silo, on the other hand, allows cross-links when they are relevant and provide useful information. These links are not added at random: they follow an editorial logic and meet a user need. This approach relies on the reasonable surfer principle, according to which not all links carry the same weight or get clicked in the same way.
In practice, the flexible silo is often the most effective. It strikes a balance between SEO and UX, makes user journeys easier and increases engagement without diluting thematic consistency. It is also a more realistic approach, one that takes into account how people really browse and the constraints of editorial work.
In conclusion, there is no universal type of silo. The right choice depends on the site, its age, its goals and its resources. A physical silo offers a solid base on a new site, while a semantic silo brings more flexibility to an existing one.
As for the degree of compartmentalisation, a well-managed flexible silo is often the best compromise for boosting SEO while offering natural, accessible navigation to users.
How to build a silo internal linking structure (step by step)
Building effective silo internal linking is not about adding links at random in a text. It is a structured method, based on a detailed understanding of topics, search intents and the role of each page within the site. To avoid mistakes and get lasting results, the set-up should be done in stages, with a clear vision of the target structure.
Identify the main topics
The first step is to identify the main topics the site wants to rank for. This phase relies on in-depth keyword research, but also on analysing search intent. It is not only about listing popular keywords, but about understanding which subjects really meet a demand from internet users and fit the site’s objectives.
Each silo corresponds to a clear digital marketing topic, with a main subject and related sub-topics. For example, an SEO-focused site can build a silo around “internal linking”, then develop pages on the semantic silo, link anchors or the internal linking audit.
This organisation helps Google understand the site and lays the foundations of a logical structure that can be used over time.
At this stage, it is often useful to use an SEO analysis tool to identify natural keyword groupings, compare similar topics and analyse the competition. This analysis phase is essential: a poor identification of topics leads to an artificial, irrelevant silo that is hard to evolve.
Create strong pillar pages
Once the topics are defined, creating the pillar pages becomes the key step. The pillar page is the centre of the silo. It covers the main subject in a global, complete and structured way, and links to more specific content that goes deeper into each aspect.
This page should be thought of as reference content. Its title, structure, tags and content must be optimised for the main subject, with an overall view of the topic. It captures most of the internal link juice and serves as an entry point for search engines and users alike.
In a thematic visual-led SEO approach, the pillar page can also include graphics, diagrams or tables that make the subject easier to grasp. This type of content improves access to information, raises visitor interest and encourages better retention.
A well-designed pillar page is rarely set in stone: it should be enriched over time, with a visible update date, to stay relevant.
Organise the secondary pages
Around the pillar page revolve the secondary pages, sometimes called child pages. Their role is to go deeper into a precise point of the topic. They answer a more targeted search intent and provide information that complements the main page.
These pages always link back to the pillar page, to reinforce its importance, but can also link to each other when the link is relevant and brings real value to the user. This organisation creates a deep but readable structure in which every page has a precise function in the silo.
Adding new pages to the silo should follow this logic. When new content is published, it must be inserted intelligently into the existing structure: a link from the pillar page, links from similar pages, and an update of existing content where needed. It is this ability to integrate continuously that keeps the silo coherent over time.
Define linking rules
The last step, often neglected, is to define clear linking rules. Who can link to whom? With which anchor? Where in the text? These rules are essential to prevent drift and guarantee a stable structure.
Best practice is to insert links in the editorial content, favour descriptive and varied anchors, and avoid systematic or forced links. The link must fit naturally into the text and meet a need for understanding or navigation.
It is also important to check the existing linking regularly, especially when creating new content or updating key pages. A one-off audit helps identify missing links, poorly integrated pages and inconsistencies in the structure.
By applying this step-by-step method, silo internal linking becomes a strategic tool, able to support the SEO visibility of the site over the long term. More than just a technique, it is an editorial and structural approach that makes information easier to reach, strengthens topical relevance and supports the growth of the site over time.
Where to place links for an effective silo
Silo internal linking is not only about linking the right pages together. The position of the links plays a decisive role in their effectiveness, for search engines as well as for the user. Not all internal links carry the same weight, or have the same impact on how the site is understood and how SEO value flows.
Links within the editorial content
Links placed directly in the editorial content are the most powerful in a silo approach. Set in the heart of the text, they fit naturally into the reader’s journey and meet a precise need: going deeper into a point, discovering a related subject or reaching complementary information. This context makes the link easier to click and more interesting.
From an SEO point of view, these links are particularly well interpreted by Google, because they come with a clear semantic context. When a link is inserted in an optimised paragraph, with a descriptive and consistent anchor, it passes value effectively to the destination page.
This is the type of link that strengthens a pillar page or a strategic page within a main digital marketing topic.
In a thematic visual-led approach, these links can also accompany graphic elements or explanatory blocks, making navigation even smoother. Used well, they make the subject easier to understand and contribute to a better overall experience on the web.
Menu, breadcrumb and footer
Links in the menu, breadcrumb trail or footer play a different role. Their primary function is to give access to the main sections of the site and ensure clear navigation, even on a deep structure. They are essential for usability and indexing, because they keep important pages reachable in a few clicks.
However, in a silo approach, these links generally pass less value than editorial links. Their repetitive, site-wide nature makes them less contextual. They should therefore be used sparingly, as a structural base and not as the main lever for circulating internal PageRank.
A simplified, optimised navigation structure, aligned with the main topics of the site, remains essential nonetheless. It serves as the foundation of the silo and makes it easier to add editorial links without confusing the user.
Anchor texts
The anchor text is a key element of internal linking. It tells the search engine and the visitor what they will find on the target page. An effective anchor should be descriptive, natural and varied, while staying consistent with the subject of the destination page.
In a silo, the aim is not to mechanically repeat the same keyword, but to use close variations that match the search intent. This diversity reinforces semantic understanding and avoids artificial signals. Generic anchors, used excessively, dilute the impact of the linking and reduce its relevance.
A good tip is to reread the text as a user would: if the anchor fits naturally into the sentence and gives clear information, it is probably well chosen. It is this editorial logic that keeps internal linking effective over the long term.
Classic silo linking mistakes
While silo linking is a powerful lever, it can also become counter-productive when badly applied. Some mistakes come up again and again and deserve particular attention when setting up or optimising your internal linking.
Multiplying links without logic
Multiplying internal links without thinking is a frequent mistake. Adding links “just to have links” does not strengthen SEO; on the contrary, it dilutes the value passed on and blurs the structure. A link must always have a reason to exist: to provide information, make navigation easier or reinforce a key page.
When it comes to SEO, quality clearly beats quantity. Well-thought-out internal linking relies on measured, gradual and consistent integration, aligned with the site’s objectives and users’ expectations.
These two dimensions (the right placement of links and avoiding classic mistakes) are often what separates a high-performing silo from an ineffective structure. When mastered, they allow a lasting increase in visibility, a better user experience and the best use of the site’s SEO potential.
Creating artificial silos
Another trap is to create purely theoretical silos, with no real editorial or user logic. These artificial structures, often designed only for Google, are increasingly easy for modern algorithms to detect, particularly with the rise of AI in SEO.
A silo must above all meet a real need: make a subject easier to understand, organise information and guide the user. If the links seem forced or disconnected from the content, they lose their value and can harm the overall credibility of the site.
Compartmentalising too much
One of the most common mistakes is to compartmentalise silos too much. By trying to strictly isolate each topic, you can block the flow of internal PageRank and create dead ends in the user journey. An important page can end up starved of SEO value simply because it is locked inside a silo that is too rigid.
An effective silo must stay open when it makes sense. Cross-links that are well integrated and relevant can strengthen the overall consistency of the site without harming the thematic structure. The aim is not to burn bridges, but to build them intelligently.
Silo linking: when it really works
Silo internal linking is not a universal recipe for every site. Its effectiveness depends heavily on the type of site, the volume of content, the editorial depth and the SEO objectives. Used well, it becomes a visibility accelerator; badly applied, it can make the structure rigid and hold back performance.
Small business websites
On the other hand, on a business website of just a few pages, silo linking is often unnecessary. When a site has only a limited number of pages, the structure is already naturally readable, and trying to create artificial silos can needlessly complicate navigation.
In this case, a simplified, optimised structure is more than enough. The main goal is to guarantee clear access to information, smooth navigation and logical internal links between the existing pages. A silo becomes relevant once the volume of content grows and several distinct topics emerge.
Ecommerce sites
On an ecommerce site, silo linking takes on an even more strategic dimension. It lets you organise categories, sub-categories, product pages and the related SEO content efficiently, without creating cannibalisation between pages. Each silo generally corresponds to a product family or a clear digital marketing topic.
On this type of site, the silo makes both navigation and understanding of the offer easier. The visitor can move naturally from a category to a buying guide, then to a product page, thanks to relevant, well-integrated internal links. This logic improves the user experience while strengthening the visibility of strategic pages.
From an SEO point of view, silo linking lets you concentrate value on the important category pages, often the ones that generate the most traffic and conversions. It also helps bring editorial content into the ecommerce ecosystem, linking it intelligently to product pages.
This integration is essential to build a structure that is optimised, readable and high-performing over the long term.
Blogs and editorial sites
Blogs and editorial sites are the ideal ground for the semantic silo. By nature, they regularly produce new content around specific topics, which makes it easier to build coherent silos over time. Each article enriches an existing group and reinforces a pillar page, considered the main content of the silo.
In this context, internal linking plays a key role in guiding the reader. Links make it easier to discover related content, encourage deeper browsing and increase the time spent on the site. From an SEO point of view, this structure lets Google quickly understand which subjects are covered in depth and identify the most important pages.
Blogs are also where the silo best fits the modern logic of search and AI-driven SEO. Algorithms analyse the overall consistency of the content, the relationships between pages and the site’s ability to cover a subject exhaustively.
A blog with well-built silo linking sends clear, consistent signals, which makes it easier to rank for competitive informational queries.
How to audit and improve existing internal linking
Even with a good starting strategy, internal linking changes over time. New content, updates, deleted pages: without regular monitoring, the structure can lose coherence. An internal linking audit lets you take back control and quickly spot where to improve.
Map the current structure
The first step of an audit is to map the existing structure. Tools such as Screaming Frog or Google Search Console let you analyse all the internal links, visualise the relationships between pages and measure the depth of each URL.
This map gives a valuable overview: it highlights the existing silos, the pages too far from the home page and any imbalances in the structure. It is an essential starting point for understanding how the site is actually perceived by search engines.
Identify orphan and over-linked pages
Once the structure has been analysed, it is essential to identify orphan pages, meaning those that receive no internal link. These pages are practically invisible to Google and struggle to rank, even if their content is good.
Conversely, some pages may be over-linked. Too many internal links pointing to the same page dilute the value passed on and reduce the effectiveness of the linking. The aim is to find a balance: every link must be justified and bring real value, for the user and for SEO.
Prioritise the optimisations
Not all linking problems can be fixed in one go. It is therefore essential to prioritise. You generally start with the pages with high SEO or business potential: pillar pages, strategic category pages, content that generates traffic or conversions.
Optimisation then means inserting relevant internal links, adjusting anchors, strengthening connections between pages of the same silo and checking that every important page is properly integrated into the overall structure. This gradual approach delivers measurable results without risking unbalancing the whole site.
These two steps (understanding when the silo is really effective and knowing how to audit existing linking) are essential to get the most out of internal linking. Used with method and regularity, the silo becomes a lasting lever to improve visibility, user experience and the overall SEO performance of the site.
Silo linking in modern SEO
With the rise of artificial intelligence, Google tries to understand topics, not just keywords. The silo remains relevant if it is logical, useful and user-centred.
Silo internal linking is an essential SEO lever when used intelligently. It improves visibility, user experience, semantic understanding and the overall performance of the site.
But it replaces neither the quality of your content nor a good overall SEO strategy. The best linking is the one that serves the user, makes navigation easier and helps Google understand the real value of your site.
Read also: the basics of internal linking and click depth.
