With Metric groups, you can create a group of frequently used metrics and then add them simultaneously. This reduces your effort of selecting individual metrics next time you need them.
You can find the create metric group option while selecting metrics for your widget. Once opened, choose the metrics from the complete list to form a group. Now you can choose this group name next time to apply all the included metrics all at once.
In this example, a new metric group "business KPIs" is created, which can then be chosen directly from the metric list while creating a widget.