Keywords Meta Tag: Is it important?

Most of bloggers and website administrator spend their time for adding keywords meta tag in their HTML code. But, what exactly happened is Google, Bing, or even Yahoo! Search do not use keywords meta tag anymore as their SEO ranking factor. You may visit this page which is explaining about meta tags which are understandable by Google. That page didn't mention anything about keywords meta tag or you can watch this video :

Should You Use Meta Keywords Tag for SEO ?

Meta keyword tags should be used with extreme caution. I have provided information on how Google really does not use this as a ranking tool at all anymore and, how the other two major search engines do indeed take a peek at this tag. You should tread carefully as improper or spammy use most likely will hurt you with Bing, or even have your site marked as spam. If you so choose to use meta keyword tags, be sure to avoid overstuffing the keywords and do not  include keywords that are not related to the specific page you place them on.

The other side of the equation is making sure your competition is not aware of your SEO plan. The downside to meta keyword tags is that, in theory, your competition can easily see exactly which terms you are targeting and in turn can pursue the same terms to rank for. If you choose other methods to attempt to rank for your terms you can do so without giving away the secret sauce to your keyword term list.

To summarize, you are running the risk of more potential harm then good when using meta keyword tags. The idea behind these tags is rather outdated and they are not worth the potential risk of the negative impact that can occur from improper use.

Source: chrisedwards.me and googlewebmastercentral.blogspot.com