Visit the territories page to start your first territory. Once you click the blue add territory button, you can then start clicking to drop pins on the map, essentially 'drawing out' the perimeter of your territory. You can use the plus/minus control at the bottom right side of the map to zoom in and out as you draw. You can make the territory as fine-grained as you want. After you are done drawing the shape by dropping pins, hit save at the top left and your territory will automatically populate with pins that fall inside of it. Next time you import pins they will automatically fall into these territories as well. To share the territory with your team, visit the team page and select the share pins button. You will now see this new territory as a group you can share with anyone you'd like.