What is AWS Organizations
AWS Organizations is an account management service that helps grow and scale AWS resources accross accounts enabling programmatic account creation, accounts grouping, simplified billing, and governance. What isn’t clear at first is why this is an important service - an AWS account is really a container for resources - and large orgs have thousands of accounts which all contain seperate, independent functional resources. Managing thousand, tens of thousands or even hundreds of thousands of accounts or simply having is really, really difficult without AWS Organiztions, Control Tower, and AWS Config.
Generally, an organization has a paying account, which is independent of other accounts and contains no functional resources, and many linked accounts which contain functional resources. The paying account does NOT have access to the functional resources or any resources in linked accounts.
Accounts can be grouped into organizational units (OU). Service control policies (SCP) and tag policies help control what can and can’t be done and can be assigned to accounts OR to OU.