Tasks is part of Apps mail designed to help you keep track of the things you need to do, without even leaving your inbox. You can create lists of items, set due dates, add details or notes, and even add email messages from your Apps mail account directly to Tasks.
Like a written task list, you can check items off your list (with great satisfaction). Even better, you can view a history of your completed tasks and the date you 'crossed' them off your list.
Often times you receive an email that causes a new task to your to do list. With the integration of Apps mail, you can actually add a related email directly to your task list and have the ability to click and recall the email referenced.
Store any information you want! Tasks is designed to help you keep track of things you need to do, but you can still use it for any listing actions you want, such as making a grocery list or outlining a presentation. You can create as many lists as you need to organize your information.
A reminder email message comes from the Principal for student progress reports. You click to 'Add to Tasks' and the email now appears in your task list. You assign a name to the task - 'Student progress reports' and add a completion date. Later that week, you start to work on the student progress reports and need to read the email from the Principal again. You open your task list, click on the 'Related email' link within your 'Student progress reports' task and Apps mail brings up the original email. When you finish your task, you 'cross' it off and clear your task list (and your mind!)