Click depth is the number of clicks needed to reach a page from the homepage by following links on the site. The homepage is depth 0, a page linked directly from it is depth 1, a page linked from that one is depth 2, and so on. It is sometimes called crawl depth or page depth.
How click depth works
Click depth is measured along the shortest available route. If your “Boiler servicing” page is reachable from the main menu, it sits at depth 1 even if it is also linked from a blog post five levels down. If it is only linked from a single article inside an archive, it might sit at depth 4 or 5 despite being one of your most important pages.
Search engine crawlers start from pages they already know, often the homepage, and follow links outwards. Pages close to the start are found quickly and revisited often. Pages many links away are reached later and less frequently, and on large sites some are barely crawled at all. Depth also roughly reflects how much internal authority a page receives, because links from the homepage and main navigation carry more weight than a link buried in the fifth page of a paginated list.
Click depth is a result of your site architecture, not a setting you change directly. Menus, category pages, breadcrumbs, pagination and contextual links in your content all decide it.
Why it matters
For people, depth is effort. A visitor looking for your prices or your service in their town gives up if it takes four menus and two archive pages to find it. For search engines, depth is a signal of importance: a site that puts a page one click from the homepage is telling Google it matters.
The effect is strongest on bigger sites. A UK online shop with thousands of products, a property portal or a recruitment site with many listings can easily push pages so deep that new items take weeks to be discovered, which hurts most when stock or vacancies change quickly. Small brochure sites rarely have a depth problem across the board, but they often have one or two important pages that are only reachable from a single blog post.
Very deep pages can also become orphan pages after a redesign, when the one link pointing at them is removed and nothing else leads there.
Common mistakes
- Relying on pagination alone. If a category list only links one page forward at a time, a product on page 30 sits around 30 clicks deep unless something else links to it.
- Burying money pages under the blog. Service or location pages linked only from articles end up deeper than the posts about them.
- Flattening everything into the menu. A mega menu with 200 links technically lowers depth but dilutes the signal and confuses visitors. A flat site architecture means a sensible structure, not every link everywhere.
- Counting the XML sitemap as a route. A sitemap helps discovery, but it is not a link on a page and does not pass internal authority.
- Ignoring links that only appear after JavaScript runs. If menus or “load more” lists need scripts to show their links, crawlers may not see those routes.
How to act on it
Run a crawl of your site with a tool such as Screaming Frog or Sitebulb and sort pages by crawl depth. List your most important pages, the ones that bring in enquiries or sales, and check where each sits. As a working rule, important pages should usually be reachable within three clicks of the homepage; it is a guideline, not a Google requirement.
Bring important pages closer by linking them from the main navigation or a hub page, adding contextual links from related content, and using breadcrumbs so every page links back up its branch. On large shops, link popular products directly from category pages and use featured or best-seller blocks. Compare the crawl with your XML sitemap to catch pages that exist but have no path at all.
On bigger sites, better depth also helps make the most of your crawl budget. Restructuring a site this way is part of the technical SEO work I carry out, usually alongside a review of the navigation and internal links.