Google Analytics is far and away the most popular analytics tool for websites. it is free, and very functional.
A small tweak to the standard Google Analytics implementation lets you measure multiple links to the same point, or the same point to multiple end points. With this you can:
- See separate information for multiple links on a page that all have the same destination. For example, if there are two links on the same page that both lead to the Contact Us page, then you see separate click information for each link.
- See when one page element has multiple destinations. For example, a Search button on your page is likely to lead to multiple destinations.