‘Additional Items’ (or ‘Additional Products’ or ‘add-on items’) are created independently of Booking Products, but can then be applied to existing Booking Products. For example, when you purchase a ticket for a trampoline park, you may also wish to purchase socks additionally to your ticket. ‘Socks’ are an additional product that can be applied to any number of Booking Products (IE: all of your jump tickets).
This section details how to apply an existing ‘Additional Item’ (EG: socks) to a ‘Booking Product’ (EG: trampoline 1 hour jump ticket).
NB: Creating a new ‘Additional Product’ is detailed on it’s own page here.