The acronym is a unique alphanumerical code that you can attribute to your events. They are unique across all events on Fourwaves and determine your event's url.
The event website: event.fourwaves.com/acronym
The event's live app: live.fourwaves.com/acronym
Choose your event acronym
In the organizer panel, go to Configuration > General.
Locate the acronym field and enter the desired acronym.
Only letters, numbers and hyphens are accepted for the acronym.