Crawl depth is the number of clicks from your homepage to a given page. It is one of the more reliable predictors of whether a page gets crawled often, indexed reliably and ranked well — and it is entirely under your control.
Pages buried deep are crawled less. Crawled less means updates are noticed later, and in the worst case the page behaves as though it does not exist.
What depth to aim for
- Within three clicks for anything commercially important.
- Four or five is workable on large sites for lower-value pages.
- Beyond six and pages are crawled rarely enough that indexation becomes unreliable.
These are rules of thumb rather than thresholds. The principle is that depth and crawl frequency move together, so the pages that matter should be shallow.
What creates depth
Deep pagination
Products only reachable from page eleven of a category are effectively very deep, even though the category itself is shallow. The fix is subcategories, not more pagination. See pagination SEO.
Over-nested categories
Each additional level pushes everything beneath it further away. Structures four and five levels deep are usually organisational preference rather than user need. See category vs subcategory.
Navigation that only exposes the top level
A menu showing only top-level sections leaves everything below dependent on in-page links to be reachable at all.
Links that are not crawlable
Click handlers, buttons and script-driven navigation do not create crawl paths. If it is not an anchor with an href, it is not a link for these purposes.
Internal linking is the lever
Depth is not fixed by hierarchy. A page nominally five levels down in your URL structure can be one click from the homepage if something links to it directly. Search engines follow links, not URL paths.
- Link from strong pages to important ones. Your most-linked pages have the most to pass on.
- Use contextual in-body links, not only navigation. They carry meaning through their anchor text.
- Link across the structure, not only downward — related products, related services, related guides.
- Give orphaned pages a route. A page with no internal links is the extreme case of depth.
- Point at the destination, not at a URL that redirects.
Measuring it
Crawl the site and look at the depth distribution. Two things matter more than the average: which commercially important pages sit deepest, and how many pages are orphaned entirely.
Cross-reference against Search Console. Pages reported as discovered but not indexed frequently turn out to be deep, poorly linked, or both. See crawlability and indexation.
Frequently asked questions
Does URL depth matter, or click depth?
Click depth. A long URL path reached in two clicks is fine; a short path reached in seven is not.
Will a sitemap fix deep pages?
It helps discovery and does not substitute for internal links. A page in the sitemap with no links pointing at it still reads as unimportant.
How many internal links per page?
Enough to be useful. There is no magic number, and a page linking to two hundred others passes little through any one of them.
Do footer links count?
They are crawlable, and site-wide footer links carry less weight than contextual ones. Useful for structure, weak for emphasis.
Consulting CTA
For a crawl-depth and internal linking review, book an SEO consultation. See also internal linking strategy.