In short Google doesn’t use the meta keywords, but other search engines do. Filling in a few of your focus keywords certainly isn’t going to hurt anything, and if they’re pulled by some of the smaller search engines and some social networks they might even do you some good.
The meta tags are a part of the HTML code of your web page. Search engines read them but do not display as a part of your web page content. Meta description include a concise summary of the web page content and your keywords.
As a general rule, you should aim to fill up the following character limits within each of your meta tags:
- Page title – 70 characters
- Meta description – 160 characters
- Meta keywords – No more than 10 keyword phrases
Include keywords if you want, but don’t spend too much time on it because recommendations are mixed. Adding content to this area won’t help to earn your website higher rankings in the SERPs.