Management Account
1. Primary account that creates and manages the AWS Organization.
2. Has full administrative control over the organization and all its member accounts.
3. Can create accounts, invites account to join, manages SCP and manages consolidated billing

Member Account
1. Any AWS account that is part of the organization but not the management account.
2. Used for dev, test, or production environments.
3. Can be:
• Created from within the organization
• Invited to join from outside