Googlebot is the web crawling bot program (spider) used by Google, which discovers new and updated documents from the web to build a searchable index for the Google search engine.

If you want to display when the last time google bot visit to your site , add your site/blog url going to www.gbotvisit.com and click on "Check Google Bot last visit" button.

Now copy and paste the code provided by gbotvisit.com into your blog/website.

If you are using Blogger, add it to "HTML/JavaScript" box. Final result will look like this.

This image is updated every day.