Share Individual Records by Territory
Where: This feature is available in Salesforce Classic in Performance and Developer editions and in Enterprise and Unlimited editions with the Sales Cloud.
Why: When sharing a record, reps can now select Territories or Territories and Subordinates. Only territories in the active territory model are available.
How: To let your reps share account records by territory, activate the critical update for enabling manual account sharing in Enterprise Territory Management. No setup is required to let your reps share other types of records by territory.