Search engine marketing: The practice of getting your website visible on the major search engines, such as Google, Yahoo! and MSN. Essentially, SEM is about delivering traffic to your website. Two of the most successful SEM strategies are search engine optimization, and pay-per-click advertising campaigns.

Search engine optimization: A system of methods used to enhance a website's ranking in search engines' natural search results. This includes optimizing the on-page factors, such as using relevant keywords, making sites W3C compliant, and a whole range of other techniques. SEO strategies are constantly evolving as the search engines update their algorithms.

Last edited by Click SSL; 1Mar2011 at 17:29..