Jenkins is an open-source automation server used to build, test, and deploy applications automatically. It is one of the most popular CI/CD tools in DevOps.
With Jenkins, every code change can automatically trigger a build, run tests, and deploy the application using pipelines. It integrates with tools like Git, GitHub, Docker, Kubernetes, and Ansible.
In simple words, Jenkins automates the software delivery process, helping teams release applications faster, with fewer errors and less manual work.