Final answer:
AWS Secrets Manager provides advanced features for managing sensitive data such as the automated rotation of secrets, and better integration with AWS services for managing databases than SSM Parameter Store.
Step-by-step explanation:
The main feature which differentiates AWS Secrets Manager from SSM Parameter Store is its ability to automate the process of rotating, managing, and retrieving database credentials, API keys, and other secrets throughout their lifecycle. Users benefit from the capacity to centralize managing secrets and integrate with AWS database services to automatically rotate secrets without changing the application's code, which enhances security.
AWS Secrets Manager also supports secret rotation for a number of databases without requiring the developer to write additional code, and provides built-in integration with Amazon RDS, Amazon Redshift, and Amazon DocumentDB. These features make it more secure and more convenient to manage sensitive information compared to SSM Parameter Store, which is better suited for managing system configurations and non-sensitive data. While the SSM Parameter Store does allow for basic secret storage, it lacks the advanced secret management and rotation capabilities of Secrets Manager.