Google guru Matt Cutts discusses how best to optimize your site for Google. Matt Cutts joined Google as a software engineer in January 2000. He is currently the head of Google’s Webspam team.
It’s official now, as Cutts states in his September 21, 2009 blog entry Google doesn’t use the keywords meta tag. Here’s the link to official entry in the Webmaster Central blog. However, the meta description may be used in some cases.
To this day, you still see courts mistakenly believe that meta tags occupy a pivotal role in search rankings. We wanted to debunk that misconception, at least as it regards to Google. Google uses over two hundred signals in our web search rankings, but the keywords meta tag is not currently one of them, and I don’t believe it will be. — Matt Cutts
Is the meta description information used? Sometimes it’s used in snippets as you will see in the following video.