How much time should I spend on meta tags, and which ones matter?

How much time should I spend on meta tags, and which ones matter? Matt Cutts, Bay Area, California

Read more about meta tags in our Help Center: http://support.google.com/webm....asters/bin/answer.py

Have a question? Ask it in our Webmaster Help Forum: http://www.google.com/support/....forum/p/Webmasters?h

Want your question to be answered on a video like this? Follow us on Twitter and look for an announcement when we take new questions: http://twitter.com/googlewmc

More videos: http://www.youtube.com/GoogleWebmasterHelp
Webmaster Central Blog: http://googlewebmastercentral.blogspot.com/
Webmaster Central: http://www.google.com/webmasters