Jenkins is an open-source automation server that provides hundreds of plugins to support building, deploying, and automating any project. It is used to quickly and easily create pipelines to build, test, and deploy software projects continuously.
For example, Jenkins can be used to create a CI/CD pipeline that automates the process of building, testing, and deploying a software project. The pipeline can be triggered by a commit to the source code repository, and it can run unit tests, integration tests, and other automated tests. Once the tests are complete, the pipeline can deploy the software to production.