In software development, Travis CI is an open-source hosted, distributed continuous integration service used to build and test projects hosted at GitHub.Travis CI is configured by adding a file named .travis.yml, which is a YAML format text file, to the root directory of the GitHub repository.Travis CI automatically detects when a commit has been made and pushed to a GitHub repository that is using Travis CI, and each time this happens, it will try to build the project and run tests.