The maximum number of accompanying persons determines how many accompanying persons they want to allow at most. You can define an individual maximum number of companions under 'Event-> Participants' -> Action-> Change Response'. You can also import these values if you add a column 'companions_max' with the respective values. The import has to be done via 'Event-> Participants-> Assign Participant-> Import List' because this value event is specific.
You can determine whether the names of the accompanying persons are also queried and whether the name is a mandatory field. You can decide whether accompanying persons are counted when the check is carried out against the maximum number of participants.
You can choose whether to create individual tickets for companions or a collect ticket. You can specify whether name tags should also be printed for companions.