We start with the point that how basic visitor knowledge such as a number of visitors & visit duration can be collected by using the log files & the page tagging. This basic information is then merged to create meaningful key performance signs that are tailored not only to the business goals of the company running the Website but also to the goals and content of the Website. Finally, this ebook presents different analytic tools & explains how to choose the right tool for the needs of the site. The ultimate goal of this chapter is to provide methods for increasing revenue and customer satisfaction through careful analysis of visitor interaction with a Website