Google’s “site:” is an advanced search operator that allows you to search through a particular site. For instance, a searcher could look for references to [GSC] in this website by doing the following search: site:seosmoothie.com GSC. Note that with this command, there’s no space between the colon and the URL. The most common use of this command is to view a list of indexed pages for a website, like this: site:www.seosmoothie.com (Google Search Central Blog ).
You probably already knew all this, but did you know that with typing in the search console “site:yourdomain.com”, you can check not only the approximate number of indexed pages but also Images, Shopping results, News, Videos, etc.
All you need to do is to click on the different options below the search box and change the type of search result.
Another cool thing is that this works not only for Google but also for the other search engines.