"Checklist Progress" custom field shows number of completed checklist items versus total number of items in the checklist, e.g. "4/5".

It gives a nice overview of the checklist completion and can be displayed in various places across JIRA, e.g. agile Board/Backlog and issue Search views:

Issue Checklist Documentation (Legacy) > Checklist Progress custom field > Checklist progress.png

"Checklist Progress" field is created, managed and modified by Issue Checklist app.

Usage

Display checklist progress in Agile views
Display checklist progress in Search view
Read checklist progress through Jira API

Checklist Progress field details

Type: Checklist Progress (locked own type delivered by Issue Checklist)

Issue Checklist Documentation (Legacy) > Checklist Progress custom field > checklist-progress-field.png

Value:

"Checklist Progress" custom field might contain following data:

"Checklist: x/y", where x is a number of completed items while y is total number of items.
Empty value for issues that do not have checklist items.

Issue Checklist Documentation (Legacy) > Checklist Progress custom field > checklist-progress-field-content.png