As a project manager or project member you may want to get notification when a task is completed or changed. You can do this by starring the task in the task & milestone tab. On the left of any task name there is a star icon which you can click on. When clicked, the icon’s color changes to bright yellow.When you start a task, any change in that task triggers notification to your email account.
The same is true for files. If you are interested on completion or any change made to any file, just star it. From now you are notified when any change is made.
To stop following any object just click again on the start icon for that object. The icon turn gray and you will not receive notifications.