On Twitter, Google’s John Mueller confirmed that Google stopped supporting the new meta keywords tag months ago. The news meta keywords that was a tag that Google introduced in 2012 for news publishers. It only worked for news publishers that are sources in Google News.
Hi Joost, it looks like we dropped support for this around the time when we removed it from the help center. Keeping it on pages is fine, we just don't use it for Google News anymore.— John ☆.o(≧▽≦)o.☆ (@JohnMu) 20. Februar 2018
How to optimize your pages
The news meta keywords tag is not the same as the regular meta keywords tag. The regular meta keywords tag also stopped working years ago. If you want to get high rankings on Google and other search engines, you have to optimize other things. The Top 10 Optimizer tool and the website audit tool in SEOprofiler help you to find out how to optimize your pages for high rankings.