Many sites do this whenever a user visits their site in order to track traffic flows.

This dashboard allows users to view and track the performance of state programs.

The science of each game is provided and users can track their performance using feedback and monitoring tools.

Each world has a dedicated page where users can track the activity of its avatars.

The ratings are displayed on graphs to help users track their moods over time.

If both users track each other, they are listed on each other's friends list.

The user must track the item and select the correct cup at the end of the round.

With it, the user can track the movements of any person, even from orbit.

This allows users to track their correspondence in a more time effective and productive way.

Trackle is an online service that enables users to track what they care about on the web at one central place.