for example, a high quality section on plants or trees may mean that descendants of flower pages in that section will be more likely to be crawled because their parent pages in the website architecture are of higher quality. This is mentioned at around 46 min in the video below. Googlebot still wants important pages after a site migration During a migration, everything has changed (all URLs), but not everything that has changed is necessarily a hugely significant change for users, especially if the redirecting URL is already classified as “
not important” with a low frequency of “material change”. According to a recent Google patent: In some cases, search engine outdated content may have no special meaning because the changes to the documents listed in a search result are minor or the fax number list relevance of the documents remains substantially the same. Would it be the end of the world if a page that hardly ever changes, or only changes a few dynamic bits and chunks while loading, redirected from the index? Probably not. The user still manages to reach the landing
page from the search engine results pages through your redirect, so their experience is not significantly reduced. Your 'unimportant' pages can actually add a lot to your pre-migration visibility It's likely that the current rankings of longer-tailed queries (which can add up to a lot) are in place due to many minor signals picked up by legacy crawls on mature URLs over time. Important pages are crawled quickly after a migration, while the majority of low to unimportant pages (which may include low or no PageRank) combined