what is fetch as google submit to index..?

what is fetch as google submit to index..?

The Fetch as Google tool enables you to test how Google crawls or renders a URL on your site. You can use Fetch as Google to see whether Googlebot can access a page on your site, how it renders the page, and whether any page resources (such as images or scripts) are blocked to Googlebot.

Google has announced they have added a new feature to the Fetch as Googlebot tool in Google Webmaster Tools. Now, you can see how Googlebot renders the page. Instead of using the Fetch as Googlebot to just see an output of code and HTML, Google will show a visual representation of what Googlebot sees.