“Helps you organize groups of accounts and the sales reps who work with those accounts. You create territories based on territory types.” Source – Trailhead.
Six things to remember & configure territories
Territory
Territory Type
Territory Priority
Territory Models
Territory Hierarchy
Territiry Model State
Steps to Create
First step is to create “Territory Type” with associated “Territory Priority”
Second Step is to create “Territory Model”
Third step is to create Territory @ Model’s Hierarcy.
Create and Run Rules
Assign the Accounts Manually.
Assign Users.
On Accounts Page Layout add the below two related list