This post describes why it’s beneficial to use a user analytics tool in your intranet. I use Google Analytics as an example of such tool, and different deployment options for SharePoint intranets are covered briefly.
Why would I use Google Analytics with my SharePoint intranet?
In general, it’s absolutely necessary for you to know your users, if you want to deliver an enjoyable user experience. One key aspect of knowing them is knowing what they do, while they use your system or service. SharePoint being a web-based software, it’s quite logical to use one of the many user analytics suites available for web sites to also analyze your intranet users.