Search engine optimization (SEO) is the process of improving the volume and quality of traffic to a web site from search engines via "natural" search results.  SEO is done through both the sponsored listings (pay-per-click) and the non-sponsored (free) listings on search engines such as Google and Yahoo.

Drupal (pronounced `dru-pal`) is an open source, modular framework and content management system written in the PHP programming language.