SEO

Meta tags module , a.k.a. "nodewords", allows setting some meta tags for each node, view or panels page. Meta tags is the preferred name.

Giving more attention to the important keywords and/or description on some of the nodes allows getting better search engine positioning (given that you really only provide the keywords which exist in the node body itself, and do not try to lie).

http://drupal.org/project/nodewords
http://drupal.org/node/161083

One of the first Drupal contrib modules implemented on this site was the Pathauto module. The reason for that was that it is probably (not sure whether this could have been done at the later stage) better that all the contnet that is created on the site will have proper search friendly URL aliases.

Here is a brief description of the Pathauto module:

This is a test for the Pathauto module to automatically create URL alias for the static page.

The rest of this static page is produced by the Lorem Ipsum generator.