Most sites stall on topical authority in SEO for a plain reason: pages that should support each other don't link to each other. Fixing that usually costs less than writing more content, and unlike a lot of SEO advice, it has been tested in controlled split experiments. This guide turns that evidence into a link map you can draw on one page: which pages become hubs, what each supporting page links to, how to write anchors, and what to do about online stores, multi-area businesses and JavaScript menus. It closes with a six step audit, AI search and measurement. For the fundamentals first, start with Technox's explainer on what SEO is. The short version: Pick one hub page per topic. Link every supporting page up to it and across to the page that earns the enquiry. Write anchors that describe the destination, and don't leave important pages with a single incoming link. Controlled tests show internal links can lift traffic (7% in one test across about 8,000 pages), but gains are modest and uneven, and more links are not always better. Topical authority in SEO is how completely and reliably a site covers one subject, shown through in-depth pages and a clear structure that connects them. The term comes from the industry, not from Google. When it came up on Reddit, John Mueller sided with the view that it is a trendy label and told people not to worry about it, according to Search Engine Journal. What Google hasn't dismissed is the plumbing underneath. Can the page be found, is it clearly described, is it connected to the pages around it? That part is yours to control. Structure has two limits. It organizes content that already exists, so linking thin pages together gives you organized thin pages. And it can't replace reputation earned elsewhere, a different lever that Technox covers in its piece on whether brand authority matters for AI visibility. Two kinds of evidence circulate. Correlation studies compare sites that happen to have more links with sites that have fewer, and can't say which caused what. Split tests change links on half of a set of similar pages and watch both halves. The tests are fewer but more trustworthy, so they lead the table. Read together, the tests say relevant, deliberate links tend to help by modest amounts, and volume for its own sake doesn't. Nothing here suggests links alone create authority. A link map is a one-page plan listing every page in a topic, what it links to, what links to it, and the anchor you'll use. Build it first. The usual failure is fixing links one post at a time with no plan for where authority should end up. Take a hypothetical business with a core service page. That service page becomes the hub because it explains the main service and is also the page that generates enquiries. Three supporting guides can answer the questions a potential customer may have before contacting the business, while a case study provides proof of the service. For example, a business offering a particular service could structure its content like this: The structure is straightforward: the hub page links to the supporting pages, while each supporting page links back to the hub. Related guides can also link to one another when the next page is useful to the reader. The case study links back to the main service page so readers can move from information to evidence and, ultimately, to an enquiry. This creates a clear path: Supporting guide → Core service page → Enquiry It also creates connections between related information: Supporting guide → Related guide → Core service page The important point is not to copy this exact structure for every website. The pages and links should reflect the actual topics, services and customer journey of the business. If two pages could both be the hub, you have a cannibalization problem to solve first. Merge them or give them clearly different intents. Search intent decides which page owns a topic, not keyword volume. Click depth, the number of clicks from the homepage, deserves a sensible reading. Audit tools commonly flag anything beyond three clicks. Andor Palau, quoted in the Semrush study above, noted that this matters for important pages and that large sites can run five levels without harm. Keep money pages shallow and don't fret about the rest. Google's guidance is plain. A link is crawlable when it is an anchor element with an href, the anchor text should describe the target, the words around it count as context, and links shouldn't be stacked side by side. The "after" versions work because the link sits in the sentence where the reader needs it, and the anchor names what is on the other side. Vary the wording across pages. Zyppy's data tied anchor variety to better traffic, and one phrase repeated across hundreds of links looks mechanical anyway. No verified quota exists for links per post. A better test is whether a reader who just finished that sentence would want that page next. Collections act as hubs and products as supporting pages, with buying guides linking into both. The trap is faceted navigation, where every filter combination creates a new URL. Google calls these a common cause of overcrawling and says to either block crawling of filter URLs you don't need indexed, or follow its URL guidelines for the ones you do. Robots.txt is the way to prevent crawling, with canonical and nofollow as softer signals. Area pages are where the location test applies directly. Link each to its nearest neighbors, and link the set from the service page it belongs to. If your area pages differ only by place name, linking them won't fix that, because each needs something local and real, such as projects, conditions or team details. If you run a Google Business Profile per location, point it at the matching area page and keep that page reachable from the main navigation. A menu that opens through click handlers instead of real anchor elements may never be followed. Google suggests using the URL Inspection Tool to confirm that anchor text appears in the rendered HTML. Check the mobile menu too, since Google indexes the mobile version of a page first. Sites that have published for years, especially blogs and product catalogs, have the most to gain, because content piled up faster than anyone connected it. A brochure site of five pages has little to organize. 1. Crawl the site. Screaming Frog, Sitebulb, or the audit tools in Ahrefs or Semrush all work. Export each internal URL with incoming links, click depth and status code. 2. Find the orphans. Indexable URLs in the sitemap with no internal links are orphans. Link each one, merge it into a stronger page, or remove it. Search Console's Links report lists your most internally linked pages. If the privacy policy tops the list, your structure is serving the footer, not the business. 3. Pick the pages that must win. Usually a short list of service or category pages. Judge every later edit by whether it helps them. 4. Draw a link map for each of those topics, as in the example above. 5. Make the edits. Start with older pages that already get traffic and add contextual links from them to the hub and supporting pages. Repair broken links, point internal links at final URLs instead of redirects, remove nofollow from internal links unless you have a specific reason, and swap click handlers for real anchors. 6. Recrawl, then wait. Crawlers usually pick up changes within days. Ranking movement takes longer, depending on competition and how weak the old structure was. For a few hundred URLs, the crawl and mapping fit in days, while editing scales with content volume. Cost depends on page count and whether the work is in-house or with an agency, so a flat number would be invented. If your team lacks time or tooling, an SEO company in Coimbatore such as Technox can run it. Sending every post to the homepage, which already has the most links, while the service page two levels down has almost none. Letting two pages chase one intent, so neither collects enough links and your anchors blur. Assuming a related posts widget will lift the posts it lists (see the SearchPilot row above). Treating all orphans alike. Landing pages for Google Ads or Meta Ads campaigns are often orphaned on purpose, which is fine if they are noindexed and out of the sitemap, and a problem if they are indexable and compete with your service page. Parking links in a resources list at the foot of the page, where few readers ever get to. Migrating a site and leaving internal links pointed at old URLs that now redirect. Google says the SEO fundamentals still apply to its AI features. Pages need only be indexed and eligible for a snippet to appear as supporting links, and making content findable through internal links is on its list of fundamentals, per its AI features documentation. The same page says AI Overviews and AI Mode may use query fan-out, issuing several related searches across subtopics before building an answer. A hub with supporting pages that each answer one sub-question gives that process several distinct pages to choose from. That is an inference, not something Google has confirmed. See how Google AI Mode optimization works and how AI search systems retrieve and assemble answers. Hub pages also gain from answer-first writing: a plain definition near the top, then links out to the detail, as Technox's notes on on-page AEO describe. For ChatGPT Search, Perplexity and Copilot, public guidance is thin. Claims circulate that two-way linking multiplies AI citations by a specific factor, and we could not trace any to a primary study. What is known about earning ChatGPT mentions is in Technox's guide on how to rank on ChatGPT. The Pew numbers matter here too. If fewer clicks arrive, the path from landing page to enquiry page becomes part of SEO, not only conversion work. Most small sites lack the page volume for a true split test, so use a staggered rollout. Change one hub at a time, leave a comparable hub untouched as a rough control, record the dates, and watch for seasonality before crediting the links. If you rewrite hub copy, add links and publish ten posts in the same fortnight, you won't know which move worked. To see whether AI engines begin citing you, Technox's SEO and AI visibility checklist is a reasonable companion. It describes how completely and reliably a site covers one subject. Google doesn't use the term, but the practices behind it, deep coverage and clear structure, are ordinary SEO. In SearchPilot's controlled tests, added links produced modest gains, such as 7% in one location page test, and some results were inconclusive. They help most when relevant and deliberate. No verified number fits every page. Zyppy's correlation data favored pages with 40 to 44 incoming links, but a footer test shows more links don't always help. Prioritize relevance. Rarely. It stops the link passing value, and Google treats it as a softer crawl signal than robots.txt. Use it only for a specific reason. It is a page with no internal links pointing to it. Google may still find it through a sitemap, but it gets no priority signal. Link to it, merge it or remove it. Crawlers can pick up new links within days. Ranking changes depend on competition and how weak the old structure was, so judge over weeks and months. It depends on the number of URLs and on whether the work is done in-house or by an agency. Ask for a scope based on a crawl of your site, not a flat price. Search Console's Links report is free. Screaming Frog, Sitebulb, Ahrefs and Semrush audits show orphans, click depth and broken links. Google lists internal links among the SEO fundamentals that still apply and says there are no extra requirements for these features. For other AI engines, evidence is thin.What Topical Authority Is, and What You Can Actually Control
What the Evidence Says (Experiments First, Correlations Second)
Designing the Link Map Before You Touch a Link
Anchors and Placement: What to Write and Where to Put It
Special Cases: Stores, Multi-Area Businesses and JavaScript Menus
Online stores and filter URLs
Businesses serving several areas
JavaScript menus
A Six Step Audit for an Existing Site
Mistakes That Waste Links
Internal Linking and AI Search
Measuring Results Without Fooling Yourself
Frequently Asked Questions
What is topical authority in SEO?
Do internal links really improve rankings?
How many internal links should a page have?
Should I nofollow internal links?
What is an orphan page and does it matter?
How long do results take?
How much does an internal linking audit cost?
Which tools help?
Do internal links help with AI Overviews and AI Mode?




