Meta Keyword Problem.

Hello, I’m sorry to hear that you’re experiencing issues with adding the meta keywords using Rank Math. The “ tag is no longer used by search engines like Google as a ranking signal, but if you still want to include it, you can follow the steps mentioned in our guide on How to Add Keywords to WordPress.

To add the keywords to your product page, you can use the Rank Math meta box. You can add the focus keyword to your product page’s SEO title, meta description, and URL by editing the snippet in the Rank Math meta box. You can find detailed instructions on how to do this in our guide on Content Analysis Tests for Product Pages.

If you have any further questions or need assistance, feel free to ask.

Sources:
Content Analysis Tests for Product Pages » Rank Math
General Tab in Meta Box of Rank Math SEO Plugin
How to Add Keywords to WordPress » Rank Math
How to Fix the “No Keywords Found in the Page Title” Test in Rank Math » Rank Math