In this video, Google’s Matt Cutts discusses Avoiding Duplicated Meta Descriptions
In this YouTube video Matt goes on to say that it is best to have no meta description at all than to use the same meta description on different pages.
On Matt’s own blog he uses no meta descriptions at all, he leaves it up the content to create a ranking. Google creates its own descriptions for pages with no meta descriptions based on the page’s content, usually the beginning body text of the page.
Watch this video to get more information on this important news about Avoiding Duplicated Meta Descriptions: