gimmick

US /ˈɡɪm.ɪk/
UK /ˈɡɪm.ɪk/
"gimmick" picture
1.

a trick or device intended to attract attention, publicity, or trade

:
The free toy was just a gimmick to get people to buy the cereal.
The new phone has a lot of cool features, but some are just a gimmick.