Advertisements was one of the most interesting things we learned about. It's interesting because the world kinda runs on advertisements. Companies used their advertising to get people to buy their product. That's just how our economy works. Companies even use false advertising to get people to buy their things. They say it'll help or improve on a certain thing that a person might be insecure about, that's what gets people to buy their product. The product might not even work all the time, but some people believe it will.  
For example, the picture on the left shows a woman holding a cup of coca-cola, as if she was drinking it. It is clear that the woman is wealthy & dressed nicely. This advertisement would probably get people to want to buy coca-cola because they think that it'll make them wealthy, rich & attractive like this woman. Or it could possibly mean that only rich people drink coca-cola. People have different perspectives.