What are tags for?

[John142]

In Blog Post/Webpage the tags will used as Met aTags i.e., Meta Title and Meta Description. These both are used for your webpage/blog post will displays in SERPs what is the post/page will says about. It is preview to the users.

[Jhoell]

Tags exist to support SEO taxonomy and help search engines read topical relevance. You don't need them on every post, empty or redundant tags waste crawl budget. In most CMS setups, 5–8 clean tags is sane. Beyond that you risk keyword stuffing, index bloat, and diluted SERP signals.