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Posted: 16 Jan 2017 08:28 AM PST
Recently, we've heard a number of definitions for "crawl budget", however we don't have a single term that would describe everything that "crawl budget" stands for externally. With this post we'll clarify what we actually have and what it means for Googlebot.
First, we'd like to emphasize that crawl budget, as described below, is not something most publishers have to worry about. If new pages tend to be crawled the same day they're published, crawl budget is not something webmasters need to focus on. Likewise, if a site has fewer than a few thousand URLs, most of the time it will be crawled efficiently.
Prioritizing what to crawl, when, and how much resource the server hosting the site can allocate to crawling is more important for bigger sites, or those that auto-generate pages based on URL parameters, for example.
Crawl rate limitGooglebot is designed to be a good citizen of the web. Crawling is its main priority, while making sure it doesn't degrade the experience of users visiting the site. We call this the "crawl rate limit," which limits the maximum fetching rate for a given site.
Simply put, this represents the number of simultaneous parallel connections Googlebot may use to crawl the site, as well as the time it has to wait between the fetches. The crawl rate can go up and down based on a couple of factors:
Even if the crawl rate limit isn't reached, if there's no demand from indexing, there will be low activity from Googlebot. The two factors that play a significant role in determining crawl demand are:
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