The purpose of the Migration Acceleration Program (MAP) is to help AWS customers accelerate their migration to AWS. As a customer moves their existing on-premises workloads to AWS, the migrated workloads are identified through a mechanism called tagging, which enables them to display AWS Cost and Usage Report (CUR) based on the migrated resources, which can be utilized to report migrated workloads’ spend and generate appropriate credits.
Tagging your migrated resources is a requirement as part of the MAP 2.0 program. Not enabling CUR or not tagging the migrated resources will result in not applying MAP credits in your account.