Every time  I log into my Google webmaster tools, I learn something new about our website.  This Google feature for webmasters is outstanding.  This afternoon I saw that we had a site map error and I was able to correct it immediately.  We also had a page that the Googlebot was not able to crawl, so again, I corrected it immediately.  The tools tell me which pages the Googlebot had trouble crawling and provides help into what to do about it.  It also tells me when the bot last crawled my site.  The statistics available include down-loadable stats, query stats, and page analysis.  I could see when we came up number one, number nine, or number two-hundred and twenty-three in specific searches. I saw that we were on the top six of searches for virtual tours in Indianapolis, Louisville, and Kentucky.  It tells me if pages were indexed and if there were any URL or HTTP errors.  It shows me what external links go to my pages.  I can set the Googlebot crawl rate.   Google let me add the Webmaster Tools as a tab on my home page so I can access the data quickly.  This tool provides an incredible amount of actionable information about your web site, and all you have to do is register your URL.  I've used Google Webmaster Tools for over a year and believe it is one reason so many clients find us on the internet.  I highly recommend it!