Custom fields and agreements let you ask buyers for the information a specific show requires and get their sign-off on the rules that come with it. Add a field for a shuttle pickup location, a t-shirt size, or a waiver, right in your branded checkout, no separate form or spreadsheet to chase down.
Some events need more than a name and a card number. When a show has a dress code, an age policy that needs a signature, or a door list that depends on details you don't normally collect, this feature puts that step inside the purchase itself, so the information and the consent are on file before the buyer ever gets to the door.