Meta tags are HTML codes that are inserted into the header on a web page, after the title tag. In the context of search engine optimization, when people refer to meta tags, they are usually referring to the meta description tag and the meta keywords tag.
<meta name="description" content="Information on the creation and deployment of meta tags. Links to free meta creation tools">
Make sure you keep your description breif and to the point
<meta name="keywords" content="metatags,keywords,search engine submission,marketing">
These can be words or keyword phrases. Leave no spaces between commas.