gimmick
A trick, device, or feature designed to attract attention or make something stand out, often in marketing, entertainment, or product design.
この商品のギミックは、開けると音が鳴るところだ。
The gimmick of this product is that it makes a sound when you open it.
This toy has a gimmick built in that makes sound.
あの映画はギミックに頼りすぎている。
That movie relies too much on gimmicks.
This book has a twist gimmick set up for the ending.
The new smartphone became a hot topic for being packed with gimmicks.
Borrowed from English 'gimmick'.