Jenkins is an open source automation server written in Java. It helps to automate the non-human part of the software development process, with continuous integration and facilitating technical aspects of continuous delivery. It is a server-based system that runs in servlet containers such as Apache Tomcat.
For example, Jenkins can be used to automate the building, testing, and deployment of a software project every time a developer commits a change to the project’s version control repository. This helps to ensure that the project is always up to date with the latest version and that any new changes are tested and verified before being deployed.