I have written about the basics of search engine optimization and how it applies to Drupal. Techniques like creating a creating a sitemap, using Metatags, and setting up pathauto all will help set up your site to be attractive to search engines. Drupal sites are fairly easy to make SEO friendly.

There are two main kinds of search engine optimization (SEO)--Off Page and On Page.  Off Page optimization relies on the links you get from others increasing your page rank.

On Page optimization can include:

• Ensuring that you have unique tiles and meta tags for your different pages and that they reflect the content of the page
• Using a robots.txt file to prevent search engine bots from indexing pages you don't want them to index
• Bulleted lists
• Using "static pages" for each of your pages (pathauto will do this nicely and automatically on your Drupal site)
• Creating a sitemap for the search engines to access