Meta Tags are used in HTML page headers, & contain information about keywords & descriptions of the world wide web page. Other than the title tag, information in the head area of your web pages is not seen by those viewing your pages in browsers. These are used to provide search engines with the information they need, enabling your site to be catalogued, & help users to find it basically who are searching related sites. Below are some common meta tags.
Title : Title is not a actual meta tag but it is worth thinking about it here in relation to them.
Meta Everything Else