To set up Issue progress bar go to the link - Admin Guide - Server - Issue Progress Bar
Visualize progress bars , measure your progress on issues workflow statuses.
Visualize the progress-bar field from anywhere in Jira. improve your filter view
Visualize the progress-bar field from anywhere in Jira. improve your issue screen view
Define the progress value per status. e.g. To Do - 0%, In Progress - 50%, Ready for deployment - 85%, Done 100%.
With Progress bar you can:
Track your progress in relationship to your status
View progress of either the issue or its aggregated Childs statuses
View the progress bar from anywhere Jira (Progress-Bar field)it