There are many ways we can trigger a job in Jenkins. Some of the common ways are as below -
* Trigger an API (POST) request to the target job URL with the required data.
* Trigger it manually from the Jenkins web application.
* Trigger it using Jenkins CLI from the master/slave nodes.
* Time-based Scheduled Triggers like a cron job.
* Event-based Triggers like SCM Actions (Git Commit, Pull Requests), WebHooks, etc.
* Upstream/Downstream triggers by other Jenkins jobs.
