Fetch as google is one of the functions of Google Search Console , and is a tool that allows you to test the URL crawling and rendering performed by Google crawlers.
By using this tool, it is possible to call the crawler to the target page immediately after the number of times is limited, so you can check whether the page is recognized correctly, the image is recognized correctly, etc.
Fetch as google is Google Search Console for a function of, to use is the appropriate site Google Search Console must have been registered in. To use it, you need to register with Google Search Console , click Crawl-> Fetch as google from the sidebar and enter the URL.
The user agent for crawling is the same as the normal google bot user agent.