You can use widgets to quickly see the participants of your event grouped by specific fields/stages.
The "Participants grouped by specific field" widget is used to see all of your participants grouped by any field, either the ones you have created or the default ones.
Example: We want to see the participants of our event grouped by nationality.
In the Event dashboard module, click on the + button to add a new widget and select "Participants group by specific field", click Save.
A couple of fields need to be filled in:
You can give any name to your widget, in this case "Participants by nationality", select the visual representation, and select the field we are basing this report on: Nationality. Confirm with the Save button.
You can now see your participants grouped by their nationality: