AWS CloudTrail is a service that tracks and records all API calls made within an AWS account. It provides visibility and auditability into the actions performed across your AWS environment, allowing you to monitor activity, identify possible malicious behavior, and surface parts of your infrastructure that might not be configured properly. CloudTrail logs contain information on management events, data events, and insight events, which are three types of events that are recorded by CloudTrail. Management events include all management operations performed on resources in your account, such as security group configuration changes and IAM role permission adjustments. Data events provide details on the operations performed on or within a resource or service, while insight events reflect unusual API activity in comparison to historical API usage. CloudTrail saves your audit logs in gzip archive form to an S3 bucket specified when creating the trail, and you can set up single-Region trails or organization trails to monitor all of the logs generated by AWS accounts within an AWS Organization. To collect and analyze CloudTrail logs with Datadog, you can use a direct integration with AWS CloudTrail, automatic field parsing of log events, cost-effective collection and archiving of logs, and expanded scope of log context for security and compliance analysis. Additionally, you can use Datadog's built-in Threat Detection Rules to detect critical security and operational issues as they occur, and explore CloudTrail logs in Datadog's Log Explorer to filter and search them to find the most important logs for your particular use case.