As an Online Marketing Consultant, I constantly get asked questions about SEO and the importance of meta tags. More specifically, the Keyword tag, seemingly the most important meta tag to many people, whom feel it is the key to SEO success. "Why isn't my website achieving a high ranking?" they ask me. "Well", I tell them, "Where you do you want to rank?" And the answer is almost always... Google!
To all you keyword tag fanatics... some sad news... Google does not use the keyword tag, and actually no meta tag for that matter, anymore. Other search engines though, like Yahoo and MSN, still take it into account. But, due to "keyword spamming" in the early days of Search Index Alogorithms, it has less relevance now than it ever has. The "description" tag and "title" tag actually have more merit than any other tag.
Ultimately, content is king with Google. A keyword is more relevant if it is dominant on your web page content and info. Keyword Density on each page is ultimately what is going to get you good ranking attention on your website. That being said, I do not reccommend getting rid of the keyword tags at all. Remember that when your website gets indexed by the search engine bots, they scroll down all the code and words on each webpage. Since they begin at the top of the page, all the way down to the bottom, Your title tag and other tags serve as an intro paragraph to the theme of your web page. Being uniform, concise, and offering relevant keyword density and content is the best method to get your site indexed well for the set of keywords you like.
But remember, keep your keywords very limited per page. I usually tell clients to keep it down to 2-3 keywords or phases per page. You want to be clear on the theme each page has, and trying to add and do too much can hinder the importance and relevance of content. Keep it simple but informative, and you should be good.
Now, go out and do it!!