Google Webmaster Tools, is way to know how Google spiders see your site/blog. It tells you many suff such as the HTTP errors found there, content type, and encoding. But what I liked most there is the ability to see the top keywords people use to get to your site.
To use this tool, you have to add your site here, then they will give you some HTNL code to add to your site/blog, after that your site will be verified.
Goolge Webmaster Tools, https://www.google.com/webmasters/sitemaps/siteoverview?hl=en
Tags: Google, Statistics, Gr33n Data