What is the Meta Keywords Tag?
The meta keywords tag is a piece of code placed in the head element of an HTML document of a page that allows you to list the keywords you'd like to target.
A typical meta keywords tag:
A long time ago when the internet and SEO were just in their beginning, this tag factored heavily into ranking decisions for search engines. Today, most search engines such as Google do not use the meta keywords tag as a ranking factor, though there are some search engines that still use them.
What Does "No Keywords in Meta Keywords" Mean?
None of the targeted keywords assigned to this URL were found in the meta keywords tag of the page.
Why It's Important
If you're targeting a search engine like Google, Bing, or Yahoo, you don't need to do anything – these search engines ignore this tag. However, if you're targeting a search engine that uses meta keywords in their ranking algorithm (like Baidu), it may be a good idea to include your targeted keywords in the meta keywords tag.
How To Fix
If you decide that it's important for your site to have an effective meta keywords tag, you'll want to rewrite them to include your targeted keywords, keeping in mind the guidelines listed below.
Guidelines for Writing an Effective Meta Keywords Tag
Only include the top 3-4 keywords you're targeting on the page. (Best practices are to not target more than 3 keywords per URL anyway).
List each keyword (or keyword phrase) descending by importance, comma-separated.
The meta keywords tag should be no more than 100 characters long.
Avoid keyword stuffing and duplicating the same keyword.
Each meta keywords tag should be unique. No URLs should have the same meta keywords value.