Description: A trigger job in a continuous integration system is a type of task that is specifically configured to initiate the execution of another job within the system. This mechanism allows for the creation of complex and automated workflows, where one job can depend on the successful completion of another. Trigger jobs are fundamental for orchestrating processes in development and deployment environments, as they facilitate coordination between different stages of the software lifecycle. For example, a build job can be configured to automatically trigger a test job once the build is complete, ensuring that the code is continuously validated. This functionality not only improves the efficiency of the development process but also reduces the possibility of human errors by automating the sequence of tasks. Additionally, the system allows for the customization of triggers, meaning developers can define specific conditions under which a job should be started, such as changes in the code repository or the completion of a previous job. In summary, trigger jobs are a key feature that optimizes continuous integration and delivery, enabling development teams to work more agilely and effectively.