Note: Quickly create other entitlements prefilled with the basic information like the start and end date, service level agreement (SLA), allocation type, and total term by using an entitlement template in Dynamics 365 Customer Service. For example, create a template for a standard entitlement, and then apply this template for every standard customer in your organization.
Template information include:
Total Term: Specify the total amount of support the customer is entitled to with respect to the allocation type. For example, if the allocation type is number of cases and you specify 100 in Total term, then the customer is entitled to support up to 100 cases.
Reference:
https://docs.microsoft.com/en-us/dynamics365/customer-service/create-entitlement-define-support-terms-customer
https://docs.microsoft.com/en-us/dynamics365/customer-service/set-up-entitlements-templates