The team planner view was introduced in MS Project 2010. The view makes it easier to see your resources workload over time and to make changes.
Resources are shown in rows across a timescale just like in the Gantt Chart. You can see which team member does what and when at a quick glance. The task names are displayed inside the task bars.
Problems such as overallocations can be quickly identified. These problems can then be rectified usually by just clicking and dragging the task to a different resource, or to a different start date.
The fact that the team planner looks like a Gantt Chart for resources, and it allows you to make changes in the same way that you may already do so in MS Outlook, helps make this view easy to relate to.