http://www.googletopsearch.com
Search engine marketing or SEM is all about driving traffic to your site. When you want to get people to come into your brick and mortar store you would put it in a good location, a place where everyone either drives by naturally or people gather for whatever reason. With the internet, your store front is your site, and it works completely the other way around. Traffic finds you not because of your location, but because your listed in the search engines.
