An element of Meta tags are used to provide structured Meta data about a web page. It can be used for specify page description. Generally, the Meta element has two uses included for to embed additional metadata within the HTML document and either to emulate the use of the HTTP response header. There are four valid attributes available in the Meta tags such as scheme, content, name and http-equiv. it is a hidden tags. There are varying types of Meta tags available include description tag, keyword Meta tags, header and sub header text, title tag and even alt tags text and anchor text for images. The first category of description tag is a brief description on your site. It is more powerful links. The second one is keyword Meta tag is used to define a method for increasing your page rank.  Third one is title tag.  These tags are that appears at the top of the browser window.