Jenkins is a free, open-source automation server used primarily for continuous integration and continuous deployment (CI/CD) — automatically building, testing, and deploying code every time a developer makes a change, rather than doing any of that manually.
What Jenkins Automates
- Running automated tests every time new code is pushed to a repository
- Building an application automatically after each update
- Deploying tested code directly to a live server
- Sending notifications when a build succeeds or fails
Why Development Teams Use It
- Catches bugs early, before they ever reach a live site
- Removes tedious, repetitive manual deployment steps
- Provides a consistent, repeatable deployment process across a whole team
- Integrates with a very wide range of other development tools
Relevance to WordPress
Jenkins is far more common in custom software and large web-application development than in typical WordPress site management. It does show up in larger, more technical WordPress projects — particularly custom plugin or theme development managed by a dedicated development team with a formal deployment pipeline.
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