GlossarySEO
What is crawl depth?
Also called: click depth, page depth, clicks from homepage
Definition
Crawl depth, or click depth, is how many clicks it takes to reach a page from the homepage by following links. Pages many clicks deep tend to be crawled less often and treated as less important.
Crawl depth, explained
The homepage is depth 0. Pages linked from it are depth 1. Pages linked from those are depth 2, and so on. SEO crawlers like Screaming Frog report this number for every URL. It's measured by the shortest path, so one link from a shallow page is enough to bring a deep page up.
Google doesn't publish a depth limit, and there's no rule that pages past a certain depth won't be indexed. The effect is indirect. Crawlers discover pages by following links, starting from pages they already know and value. The homepage and main hubs get crawled most often, so pages linked from them are found and refreshed quickly. A page that's six clicks down behind pagination may be discovered late and revisited rarely. Pages that many internal links point to also look more important.
Depth problems usually come from three patterns: long paginated lists where item 400 sits on page 20, category trees nested several levels deep, and new content published without links from anything but the newest page in a feed. Programmatic sections are especially prone to it.
Fixes are cheap. Add hub pages that group content by topic. Link popular and new pages from the homepage or main hubs. Cross-link related pages so there are many short paths. Use sensible pagination with direct links to page ranges. Keep your key money pages within two or three clicks.
Why it matters for founders
When new pages sit in "Discovered – currently not indexed", depth is often part of the reason. Bringing them closer to the homepage is one of the few levers you control directly.
Example
An audit shows your integration pages sit at depth 5, reached only through a paginated list. You add category hubs linked from the main navigation, and the pages move to depth 2.
Common mistakes
- Relying on the sitemap to make up for deep pages.
- Long paginated archives as the only path to older content.
- Linking new pages only from the latest-posts feed.
- Nesting categories several levels deep for tidiness.
Sources
- Google Search Central: SEO link best practices
- Google Search Central: In-depth guide to how Google Search works
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Related terms
- Site architectureSite architecture is how a website's pages are organized and linked: the hierarchy of sections, the URL structure and the internal links between them. Good architecture helps crawlers and people find every important page quickly.
- Internal linkingInternal linking is linking from one page on your site to another page on the same site. It helps visitors and crawlers find pages and tells search engines which pages matter and what they're about.
- Orphan pageAn orphan page is a page on your site that no other page links to. Crawlers can only find it through a sitemap or external links, and it's usually crawled rarely and treated as unimportant.
- PaginationPagination splits a long list, like blog posts or products, across several pages. Google treats each page as a separate URL, so each needs its own URL, crawlable links and a self-referencing canonical.