The crawler sends GET requests to the server. The server responds with headers and the contents of the file, which then gets saved.
The request is likely to come from a mobile user-agent since Google is mostly on mobile-first indexing now. You can check to see how Google is crawling your site with the URL Inspection Tool inside Search Console. When you run this for a URL, check the Coverage information for “Crawled as,” and it should tell you whether you’re still on desktop indexing or mobile-first indexing.
The requests mostly come from Mountain View, CA, USA, but they also do some crawling for locale-adaptive pages outside of the United States. I mention this because some sites will block or treat visitors from a specific country or using a particular IP in different ways, which could cause your content not to be seen by Googlebot.
The workload like this whatsapp number list allows both the vendor and the affiliate to focus on. Clicks are the number of clicks coming to your website’s URL from organic search results.
Resources and Links
Google does not navigate from page to page as a user would. Part of Processing is to check the page for links to other pages and files needed to build the page. These links are pulled out and added to the crawl queue, which is what Google is using to prioritize and schedule crawling.