Amazon Web Services (AWS) offers a managed relational database service called Amazon RDS (Relational Database Service), which includes support for PostgreSQL (often referred to as AWS RDS PostgreSQL). It allows you to set up, operate, and scale PostgreSQL databases in the cloud easily.

With AWS RDS PostgreSQL, you can offload database administration tasks such as hardware provisioning, software patching, backups, and scaling to AWS. This way, you can focus on building your applications without worrying about the underlying infrastructure.

Here are some key features of AWS RDS PostgreSQL:

1. Automated Backups and Restore: RDS automatically takes backups of your PostgreSQL database and allows you to restore to any point in time within the retention period.

2. High Availability: RDS provides multiple features like Multi-AZ (Availability Zone) deployments and Read Replicas to enhance the availability and fault tolerance of your PostgreSQL database.

3. Scalability: You can easily scale your database instance up or down based on your application’s needs, allowing you to handle varying workloads efficiently.

4. Security: AWS RDS PostgreSQL provides security features like encryption at rest, SSL support, and integration with AWS Identity and Access Management (IAM) for access control.

5. Monitoring and Metrics: AWS RDS offers various monitoring and metrics tools, including Amazon CloudWatch, to help you keep track of the performance and health of your PostgreSQL database.

6. Compatibility: AWS RDS PostgreSQL supports the standard PostgreSQL database engine, ensuring compatibility with your existing PostgreSQL applications.

To create an RDS PostgreSQL instance, you can use the AWS Management Console, AWS CLI (Command Line Interface), or AWS SDKs (Software Development Kits) in various programming languages.