How do you initiate the Jenkins process for automation of build and deployment?

To initiate the build and deployment process in Jenkins, you typically create and configure a Jenkins Pipeline or Freestyle Job. The launch can be triggered in several ways:

• Manually through the Jenkins web interface by clicking the "Build Now" button.
• Automatically on an event, such as a commit to the repository (via webhook).
• On a schedule using a cron trigger.

Example: to run a build on a commit, you set up integration with Git, specify the branch, and add a webhook that will notify Jenkins of new changes, after which Jenkins will automatically start the build and deployment.