Jenkins is an open-source automation platform used to implement continuous integration and continuous delivery (CI/CD) processes. It automates build, test, and deployment tasks by executing jobs triggered by events such as new commits, branches, and pull requests across different types of environments. Its highly extensible plugin architecture enables seamless integration with numerous tools and technologies. Jenkins is primarily used for building, testing, and deploying software projects and automating CI/CD pipelines. It orchestrates complex workflows across multiple development stages and integrates with various tools and technologies in the software development lifecycle.