Which AWS service automates the deployment of application code to Amazon EC2 instances and to on-premises servers?

AWS CodeDeploy automates code deployments to various compute services, including Amazon EC2 instances, AWS Fargate, AWS Lambda, and on-premises servers. This service handles the complexity of updating applications, minimizing downtime during deployments. AWS CodeCommit is a version control service for hosting Git repositories, not for deployment. AWS CodeBuild compiles source code, runs tests, and produces deployable artifacts, but it doesn't deploy them. AWS CodePipeline builds, tests, and deploys your code every time a code change occurs, but CodeDeploy is the specific service within CodePipeline that performs the deployment to the instances.