Google follows links and sitemaps provided in search console to crawl websites.
Pages are revisited to check if they have changed
The crawlers needs to prioriterise what and when to crawl different pages, and different domains/websites.
Successfully crawled pages are passed to the index
Google computes crawl rate of your website – according to what traffic your site can handle.
Provides stats about Googles crawling of your site.
Looks out for errors and drops & spikes in graphs.
