Ever wonder if there are more meta tags than 'keywords' and 'description'? Well guess what? There are dozens, some automatically are generated by your HTML editor but not all of them are beneficial to your websites search engine rankings. Below is a list of meta tags (courtesy of
About.com's Meta Tag Library).
USAGE: Color Key: Highly Recommended, Recommended, Optional, Not Recommended, Non-English sites Only, Do Not Use
META TAG NAME DESCRIPTION
abstract One sentence overview of the entire web page
author Author of the web pages content
content-language Natual language of the website
content-script-type Default scripting language of the page
content-style-type Default CSS language of the page
content-type The MIME type and character set of the page
copyright Copyright date and info for the page
date To note when the web page first launched
description* A short description of the web page
designer Indicates the web designer of the site
distribution How the page should be distributed
expires The expiration date of the content on the page
generator The HTML editor and version that created the page
google Info for Googlebots, how to index, archive, etc.
keywords* The keywords associated with the page
language The language of the web page
msnbot Info for MSNBot, how to index, archive, etc.
PICS-Label Rating of the web page for child safe programs
pragma Force the page to not be cached or reload
publisher The HTML editor and version that created the page
rating Content ratings for parental control
refresh Reload the page from the server or redirect
reply-to Provide cntact info for the web page
resource-type The type of document the page is
revisit-after Supported by one search engine for spiders
robots Tells search engines what they can index and follow
set-cookie Set a cookie in the web browser
subject The subject of the web page
title Sets the page's title, not the same as TITLE tag
description* The meta description tag is used by search engine spiders, and provides them with a description of your web pages. It is most often used for SEO (search engine optimization) to provide a short (1 – 3 sentences, most search engines cut off descriptions at 160 characters, I recommend staying below that number) description of the contents of the page. I recommend using a different description for every web page on your site, helping both search engines and the people visiting the site. I highly recommend this tag, if you don’t include it, search engines just use the first two sentences from each page, which can sometimes prove less useful to visitors to your site and SEO.
keywords* The meta keywords tag is used by some search engines to indicate what search terms the page should show up under. While I do recommend using this meta tag since it does have some benefits, it’s benefits are not going to guarantee you any specific search page ranking so the time spent on it should be short. Keywords should be kept to 10 - 15 single words or 1 - 2 word phrases.