The document discusses subliminal advertising and how it works. It explains that subliminal messages bypass the conscious mind and go directly to the subconscious, which regulates behavior. Examples are given of studies where subliminal messages in movies increased popcorn and soda sales. While subliminal ads can influence accessibility of concepts, they are more likely to affect behavior if the person is already in a state of needing something, like a drink. The document also discusses different types of subliminal messages like backmasking and flashing messages, and debates whether the influence of subliminal messages is negative or positive.