The task list view is used to view tasks which are currently assigned to you. The grouping of the task list is configurable in CompleteProject settings.
At first glance you can see that the task list view is very similar to the project list view - both had the task description icon information and project navigation. The difference is that task list you only shows items which are currently owned by you. The task list will not show items which are delegated to others or items on which you only have read permission. You must be the owner of the item. Also, unlike the project list view, the task list view shows your tasks grouped by category instead of In a tree.