You can create an Event custom audience to target those who have engaged with your Facebook event with an ad. Targeting options include:
- People who responded Going or Interested
- People who have responded Going
- People who have responded Interested
- People who have visited the event page
- People who have engaged (liked, commented, shared)
- People who have engaged with tickets (entered ticket flow and either bought or abandoned)
- People who have purchased tickets
- People who had intention of purchasing tickets (only those who entered ticket flow but didn’t purchase)
Some related reading: