What Is Crawl Budget?
The crawl budget is the number of URLs on a website that search engines can crawl within a given timeframe. Essentially, it's the amount of attention search engines give to your site. Search engines have limited resources and can't crawl every website daily, so they prioritize which sites and pages to crawl based on factors like site size, health, and popularity.
As Google's John Mueller explains, "Crawl budget is the number of URLs that Googlebot can and wants to crawl on your site." This means that even if Google can crawl more pages, it might not if it deems those pages unimportant or low-quality.

Why Is Crawl Budget Important for SEO?
A crawl budget is crucial because it directly affects your website's visibility in search results. If search engines don't crawl your pages, they won't be indexed; if they're not indexed, they won't rank. This can significantly impact your organic traffic and overall business goals.
A well-optimized crawl budget ensures that search engines prioritize crawling your most important, high-quality pages. This leads to faster indexation of new content and updates, which means your SEO efforts will have a quicker impact on your rankings.