gimmick
A trick or feature used to grab attention or interest.
A gimmick is a trick or device designed to attract attention or make something seem more interesting than it really is. When a cereal company puts a toy in every box, that's a gimmick to get kids to beg their parents for that brand. When a restaurant serves burgers in tiny shopping carts instead of on regular plates, that's a gimmick to make the food feel special or unique.
Gimmicks aren't always bad. A clever gimmick can make something genuinely more fun or memorable. But the word often carries a slightly negative feeling, suggesting that something relies on flash and novelty instead of real quality. A book might use holographic covers as a gimmick, but if the story inside is boring, readers will feel disappointed. A video game might have a cool gimmick like motion controls, but players want good gameplay too.
The key question with any gimmick is whether it adds real value or just grabs attention. A teacher might use gimmicks like funny voices or props to make lessons engaging, which works great if students actually learn. But if a product is all gimmick, it means there's nothing of substance underneath the flashy surface. Smart consumers learn to look past gimmicks and judge things on their actual merit.