Meta tags (or metadata, or meta information) might be the trickiest SEO optimization; it’s not complicated, but it isn’t very apparent to most users because meta tags are only visible under certain circumstances. Meta tags describe various aspects of your page to search engines and users and are defined within the HTML code of your site. While there are many, we’ll be focusing on title tags and meta descriptions in this article. Alt text, though not a piece of metadata, is also included here.
Meta Tag Basics
tags
how to add metadata
metadata on images
Meta Tags for Jewelers
purpose of metadata