https://www.theguardian.com/commentisfree/2011/oct/24/advertising-poison-hooked
here's a bit:
Advertising claims to enhance our choice, but it offers us little choice about whether we see and hear it, and ever less choice about whether we respond to it. Since Edward Bernays began to apply the findings of his uncle Sigmund Freud, advertisers have been developing sophisticated means of overcoming our defences. In public they insist that if we become informed consumers and school our children in media literacy we have nothing to fear from their attempts at persuasion. In private they employ neurobiologists to find ingenious methods of bypassing the conscious mind.
Pervasiveness and repetition act like a battering ram against our minds. The first time we see an advertisement, we are likely to be aware of what it's telling us and what it is encouraging us to buy. From then on, we process it passively, absorbing its imagery and messages without contesting them, as we are no longer fully switched on. Brands and memes then become linked in ways our conscious minds fail to detect. As a report by the progressive thinktank Compass explains, the messages used by advertisers are designed to trigger emotional rather than rational responses. The low-attention processing model developed by Robert Heath at the University of Bath shows how, in a crowded advertising market, passive and implicit learning become the key drivers of emotional attachment. They are particularly powerful among children, as the prefrontal cortex which helps us to interpret and analyse what we see is not yet fully developed.
Advertising agencies build on this knowledge to minimise opportunities for the rational mind to intervene in choice. The research company TwoMinds, which has worked for Betfair, the drinks company Diageo, Mars, Nationwide and Waitrose, works to "uncover a layer of behavioural drivers that have previously remained elusive". New developments in neurobiology have allowed it to home in on "intuitive judgments" that "are made instantaneously and with little or no apparent conscious effort on the part of consumers at point of purchase".