Get an overview of the number, or types of pages on a given site.
The results will be all the pages of your site on Google that have been indexed. These pages will always be possibilities of pages that could show up in a search.
This is an excellent way for analysing your site SEO. If you don't have the pages you expect indexed on Google, that could be the reason towards your sites SEO issues. No one is going to be able to find pages that aren't there. As far as search engines are concerned, pages that aren't indexed aren't there.
Usage: site:yourwebsite.com, note: Do not include a space between the “site:” and the domain