A page three clicks deep struggles because it sits on the weak end of three connected currents at once: it gets crawled less often, it receives less internal link equity flowing down the chain, and its depth quietly signals lower importance to search engines. None of these alone is a hard penalty, but together they leave the page competing from a thinner discovery-and-equity base than pages closer to the surface.
Start with crawling. Search engines visit pages near entry points more frequently and reliably, so a page several hops in gets re-crawled less often. That means slower discovery of updates and fewer chances for the page to be re-evaluated as it earns relevance. Layer on equity: each page divides the authority it has among the links it carries, so by the time link value travels from the homepage down through two intermediate pages, only a fraction reaches the third. The deep page inherits a diluted share of whatever strength the site holds.
Depth also functions as an importance signal. Where you place a page in your link structure tells search engines something about how much you value it. A page you bury behind several clicks reads as less central than one you link prominently, and that perceived importance feeds into how the page is weighted. So the three-clicks-deep page is not being punished for a number; it is being read, fairly enough, as something the site itself did not prioritize, and it carries less crawl attention and less equity to back up any ranking ambition. This is observed behavior, a correlation between depth and diminished signals, not a fixed rule that activates at click three.
The fix is to surface the pages that deserve to rank closer to a hub. Add a contextual link from a strong, frequently crawled page, place the page in a relevant category or related-content module, or pull it up in the navigation if it earns the spot. Each move shortens the path, restores some equity flow, and raises the importance signal, which together lift the page off that weaker base.