If you have a website then you will probably want to know how many people are coming to your site, where they are finding you and what they are doing once they land on your site. I am always surprised by the number of companies that do not have access to this information as it is vital to allow you to evaluate your marketing performance as well as improve your website customer experience.
There are many programs that offer statistic tracking the most commonly used on being Google Analytics. Although Google Analytics is very user friendly and free, it is not always the most accurate in terms of real visitors.
Web server stats are usually bolted on to every hosting package but these are often quite limited in terms of data and also sometimes record visits from spiders that crawl your site. Ideally you should use a number of stats packages to try and get a true picture of how your website is performing.