How we can enable the deployments and its purpose in Jira Software

To enable Deployments for your Jira Software project, follow the followings steps. 

1. Navigate to your project.
2. Go to Project Settings > Features.
3. Enable the Deployments feature.

A new menu item, Deployments, will be added to the project menu.

Purpose for enabling the deployments:

The Deployments feature gives you greater visibility of deployments by tracking and displaying CI/CD Pipelines against your Jira issues over a time scale. You can visualize the progress of a work-item as it moves through your deployment pipeline.