What is the primary function of AWS CloudTrail?

AWS CloudTrail primarily functions as a service that enables logging and monitoring of API calls made within an AWS account. By recording the actions taken by users, roles, or AWS services, CloudTrail provides a detailed event history that includes information such as the identity of the API caller, the time of the API call, the source IP address, and the request parameters. This functionality is essential for tracking user activity, ensuring compliance, and detecting unauthorized access or operational issues across AWS resources.

The logs generated by CloudTrail can be used for troubleshooting, security analysis, and governance. They allow organizations to maintain visibility and control over their AWS resources, which is critical for maintaining security and compliance within a cloud environment. This comprehensive logging capability is what makes CloudTrail vital for security and compliance operations in AWS.