You have Yoast SEO installed on your WordPress, and you are adding in SEO Titles and SEO Descriptions for all your Posts and Pages and getting that Green light with your Yoast SEO Check:
This is good news! But, did you know there is an SEO option for your post categories as well? You should be adding SEO Meta to Post Categories to help increase your rank even further.
If your post categories are included in your SiteMap, which by default they are, then your categories are also being indexed by the major search engines, this includes Google. So when Google crawls your site and sees your categories’ empty meta information, it simply doesn’t help your rank. You can chose how you want your post categories to appear, but this gives you yet another opportunity to rank with your SEO settings.
You go about this the same way you would with your Post/Page SEO content, you just have to actually do it! Don’t forget getting your Post Categories all SEO’d up as it gives you another opportunity for Google to index more of your pages.
Here’s how you do it:
1. Click on Posts–>Categories: