AWS CodePipeline is a continuous integration and continuous delivery (CI/CD) service that automates the build, test, and deployment phases of software development. It allows developers to model their software release process as a series of stages, enabling faster and more reliable updates to applications. With AWS CodePipeline, teams can easily integrate with other AWS services, such as AWS CodeBuild for building code and AWS CodeDeploy for deploying applications. This service helps streamline workflows, reduce manual errors, and improve collaboration among team members, ultimately leading to quicker delivery of high-quality software.