Sentence examples for a gimmick from inspiring English sources

The phrase "a gimmick" is correct and usable in written English.
It can be used to describe a trick or device intended to attract attention, publicity, or business, often with a connotation of being superficial or insincere.
Example: "The new marketing campaign was just a gimmick to boost sales temporarily."
Alternatives: "a ploy" or "a trick".