An HTML tag that identifies the contents of a Web page for the search engines. Meta tags are hidden on the page, but they, as well as all the HTML code on a page, can be viewed by selecting ...

A language that is used to define elements in a document or Web page by embedding codes (tags) surrounded by common start and stop characters. For example, the tags in SGML, HTML, XML and WML all use ...

The belief here is that the keywords you use in H2-H6 subheadings are more heavily weighted in Google’s algorithm than words in plain text and that tags are therefore a ranking factor of their own.