Answer:
subliminal
Step-by-step explanation:
Subliminal advertising is also called hidden advertising, it uses messages that are below the threshold where customers are concious of it. For example advertisement that is played when someone is sleeping.
Subliminal advertising subconsciously influences how a person makes purchase decisions.
Coca cola during a TV program, the words and logo "Drink Coca-Cola" were flashed on the screen for a fraction of a second every few minutes. The vast majority of viewers were not consciously aware of seeing the images because they were so brief.
This is a subliminal message.