Drupal naturally does well in search engine rankings. There are a few things that you can do to help improve those rankings like using Pathauto, XMLSitemap, and Meta Tags. I've written a little bit about Pathauto and XMLSitemap and now--Meta Tags.

Metatags are less important than they used to be in SEO. They are subject to abuse with most search engines relying on keywords on a page rather than relying on meta-data to determine what a page is all about. That said, adding meta-data to your site can't hurt your rankings and can help.

The Meta Tags module allows you to easily meta tags to your pages potentially improving your search engine rankings.

This module allows you to set some meta tags for each node, view or panels page.

Giving more attention to the important keywords and/or description on some of your nodes allows you to get 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).

Step 1 -- Install the Module

• Go to http://drupal.org/project/nodewords and download the module package
• Using your favourite FTP program, upload the package to /sites/all/modules
• On your Drupal site, go to /admin/build/modules and enable meta tags
• Then head over to /admin/user/permissions and add permissions to the role or roles you would like to administer and/or add meta tags to the site. You'll find it under Nodewords in the menu
• On /admin/content/nodewords you can set up your global settings
• On /admin/content/nodewords/frontpage you can add specific metatags to your frontpage

Step 2 -- Use the Module

Once it is set up, you will find a new fieldset on your /node/add pages called Meta tags. You can enter a few keywords that describe your content and a description field. That field will use your teaser if no description is entered into the field.