WordPress tags are not just a list of search keywords. They exist to help you organize content on your website, not to boost your search rankings.
WordPress categories and tags are extremely beneficial for organizing your posts. When used wisely, they can also help your SEO efforts, even if it's just by indirectly boosting the other metrics that Google looks at (such as time on site).
In WordPress, tags and categories have a tremendous impact on your site's rankings in search engines. When used correctly, proper use of tags and categories can boost your site's SEO. The opposite is also true: when used incorrectly, it can harm your site's rankings .