Were surrounded by them everyday all the time. Advertisements are apart of our life regardless of where we are. TV, billboards, on the internet and in magazines everywhere- advertisers strive to get our attention and seek our responses. They want us to feel something so that we will remember whatever it is they are trying to sell. Some ads do a great job at this while others seem to fail. One way that advertisers get our attention is by associating their product with something we desire- which could be an attractive female or male or a distinct memory that makes us feel happy or sad. They want our ATTENTION, and they will do whatever they can to get it.
Check out this Chevy ad
It is a great example of how advertisement strives to get your attention emotionally, using their product (the conditioned stimulus) to get you to remember their product and the emotions you associate it with.