AWS Config lets you assess, audit, and evaluate how your AWS resources are configured, and helps you determine your overall compliance against the configurations specified in your internal guidelines. You can use AWS Config aggregators to collect your configuration and compliance data from the below sources, and aggregate that data into a single account and AWS Region to get a centralized view of your resource inventory and compliance.
Multiple accounts and multiple AWS Regions.
A single account and multiple AWS Regions.
An organization in AWS Organizations and all the accounts in the organization that have AWS Config enabled.
Source:: Amazon AWS