Advertising and commercials are massive examples of how we decode and take in meanings for what we are presented in front of us. They are also pieces of history as and advertisement often reflect the cultural norms and withhold historical context behind each one. They reflect social norms and reflects a different time and place.They also reinforce cultural myths as well as values within the period.
Maslow devised a hierarchy of human needs that shows what we need to be for filled and how advertisers use this to there advantage by targeting these needs.
linguistics is defrentiating literal meanings such as denotation and connotation is where you have to think deeper into it and maybe have intertextual references that associate with the thing we look at.