Travis CI is a cloud-based continuous integration service that helps developers automate the process of testing and deploying their code. It integrates seamlessly with platforms like GitHub, allowing users to run tests on their code every time they make changes. This ensures that any issues are identified early in the development process. By using Travis CI, teams can improve their workflow and maintain high-quality code. The service supports multiple programming languages and offers customizable build configurations, making it a versatile tool for developers working on various projects.