Tuesday October 13, 2009, by Paul Blair
In this article (http://googlewebmastercentral.blogspot.com/2009/09/google-does-not-use-keywords-meta-tag.html) dated 21st September 2009, Google confirms once and for all that the Keyword meta tag has no influence on search rankings.
The reason is that the keyword meta tag was so widely abused by webmasters that Google no longer use it in their ranking algorithm.
The comments left by readers show a polarity between those that believe this already, and many who want to keep hold of their keywords 'just in case'. I wonder if its a comfort to some people to believe that keywords help search rankings - and thus it is a shortcut to actual proper SEO.
Of course, there are other search engines and other algorithms, but from what I have read, they too don't give the keyword meta tag much weight in their rankings.
For us, we leave it out - if there's no value, then we won't waste our time on it.