A meta tag is an HTML tag used in the heading to describe the content which a web page contains. Meta tags help the search engine crawlers with indexing by providing information about a site. This information includes the keywords used on a page, descriptions of a page, who authored a page, and a page’s update frequency. Meta tags do not appear on the web page itself, but some meta tags - such as title tags and meta descriptions - do appear in the search engine results pages (SERPs).
Search engines will be able to better index your site with the proper use of meta tags; better indexed sites tend to help your rankings in the long run. Certain meta tags, like meta descriptions and title tags, have negligible impact on search rankings, but do show up in the SERPs. Therefore, they help your human audience understand your page’s content and entice them to click, which means more traffic for you.
There are many types of meta tags, and they all serve a different purpose. Here are the common types of meta tags used, click on a topic to learn about them and how to create them: