Meta keywords operate behind the scenes.
They are content descriptors that appear in the source code of your page to help search engines understand what your page is all about. Including spaces, meta keywords are 160 characters in length.
Today’s search engines have figured out that sites can “stuff” meta keywords. As a result, they play a smaller part in driving SEO. However, every little bit helps when it comes to SEO.
Meta keywords can still add value by communicating your message and attracting searchers to your site. Although they might not help you get to the SERP, meta keywords are important in driving user click-through from a SERP.