meta tag in html

Keywords for Search Engines
Some search engines on the WWW will use the name and content attributes of the meta tag to index your pages.
This meta element defines a description of your page:
<meta name="description" content="Free Web tutorials on HTML, CSS, XML, and XHTML" /> 
This meta element defines keywords for your page:
<meta name="keywords" content="HTML, DHTML, CSS, XML, XHTML, JavaScript" /> 
The intention of the name and content attributes is to describe the content of a page.
However, since too many webmasters have used meta tags for spamming, like repeating keywords to give pages a higher ranking, some search engines have stopped using them entirely.