A task is similar to an appointment in that it is something you must attend to. It is different in that it does not have a specific date or time associated with it, although it may well have a due date by which it is supposed to be completed. In this sense, Outlook tasks are pretty much like a paper to-do list that you stick on the fridge. When you look a little deeper, however, you’ll find that they can do so much more:
You can be reminded of a task at a specified time and date.
You can specify different priorities for different tasks.
You can assign a task to someone else and send that person a message with the required information.
You can assign a status to a task (not started, in progress, and so on) as well as a percent completed value.
You can send a status report on a task to other people.
I find that Outlook’s Task feature is something I use all the time.