a way to group gifts so it's one purchase. for example if it's like a microphone and then like a filter or something so the buyer has to buy both things together. or like you could make a bundle for like pamper stuff. so it groups a bunch of items as one item but still works with things from like amazon so throne buys it all. just a way to tidy the wishlist up more and for if like you need two items for something to work such as a microphone and a mixer.