Google bot fetches a URL from the crawl queue by making an HTTP request. Now, this is the basic process of crawling any web page. It also shows if you allow it to crawl in the robots.txt file. So if the file marks the URL as disallowed, then the Google bot won’t crawl that web page.
And the system that handles Google rendering is called WRS (Web Rendering Service. WRS receives the URL, renders them, and sends the generated URL back for the following process. There are two types of rendering.
- Server Side Rendering
- Client Side Rendering