Crawl Budget
The number of pages Googlebot will crawl on a site within a given time period, determined by crawl rate and crawl demand.
Definition
Crawl budget is the total number of pages that Googlebot crawls and indexes from a website within a given timeframe. Google's crawl budget documentation defines it as a function of two factors: crawl rate limit (how fast Googlebot can crawl without overloading the server) and crawl demand (how much Google wants to crawl based on the site's popularity and freshness requirements).
For most small to medium websites (under 1,000 pages), crawl budget is rarely a concern — Googlebot will discover and crawl all important content in a reasonable time. It becomes a significant issue for large e-commerce sites (millions of product and faceted navigation URLs), news sites with high publication velocity, and sites with many low-quality or duplicate URLs competing for crawl attention.
Tactics to improve crawl budget efficiency: implement robots.txt to block non-essential URL patterns (search result pages, faceted navigation parameters, duplicate category pages); use canonical tags to consolidate duplicate content; fix redirect chains that waste crawl quota on intermediate URLs; improve server response time (slow servers reduce crawl rate); and keep the XML sitemap clean with only canonical, high-value URLs. Monitor crawl stats in Google Search Console's "Crawl stats" report to detect inefficiencies.