Google bot last visitGooglebot is the search bot software used by Google, which collects documents from the web to build a searchable index for the Google search engine. When you search for sites that display your IP, you will often see the googlebot's IP address.
If a webmaster wishes to restrict the information on their site available to a Googlebot, or another well-behaved spider, they can do so with the appropriate directives in a robots.txt file, or by adding the meta tag <meta name="Googlebot" content="nofollow" /> to the web page. Googlebot requests to Web servers are identifiable by a user-agent string containing "Googlebot" and a host address containing "googlebot.com".
Currently Googlebot only follows HREF links and SRC links. Googlebot discovers pages by harvesting all of the links on every page it finds. It then follows these links to other web pages. New web pages must be linked to other known pages on the web in order to be crawled and indexed or manually submitted by the webmaster.
A problem which webmasters have often noted with the Googlebot is that it takes up an enormous amount of bandwidth. This can cause websites to exceed their bandwidth limit and be taken down temporarily. This is especially troublesome for mirror sites which host many gigabytes of data. Google provides "Webmaster Tools" that allow website owners to throttle the crawl rate.
To display the last time google bot visit your site , add your site/blog url and click in "Check Google Bot last visit" button , cut and paste the code in your site , the image are updated every day . In stats page display top pages indexed in Google index.