This document provides an introduction and overview for an upcoming session on websites and advertising. It discusses four main ways that people come to websites, with search engines being critical as 80% of internet traffic begins with a search engine. It emphasizes that Google is dominant in search traffic, handling 92.4% of searches. The document also lists two rules: that sessions should not be about oneself or one's company, but about customers who now have control and can negatively impact companies if angered.