Ambassadors are the on-site point of contact for the event's hosts and members. They can provide you real-time information on the event and are there to oversee the event and note any outstanding or disruptive behaviors.
If confirmed for an event, you'll then receive any additional event details, including specific arrival instructions and the name or names of the event ambassadors. You have the ability to contact your ambassador(s) should you have any additional questions or concerns.
To become an Ambassador you must have high enough member rating with little to no cancellations, no-shows, or incompleted events. You may apply for an account review here.