The rating widget is great way to mark something from 1-5 stars.
It can be urgency, quality, well it's up to you.

How to add the progress (completed) widget?

Click on the + to add new widget and widget window will open.

How to add widgets

Then click on the rating widget to add it.

Rating widget

How to set use the rating widget?

Simply add the widget, and click on the desired star.

How to use rating widget