What is the difference?

Marketing is the process of how a company ships, advertises, and sells their product.  Wal-Mart is known for its efficient marketing and low costs as a result of this.  Advertising is any poster, commercial, or billboard to make people think about and want to try out a product.  Although companies like Coca-Cola would have to truck their product anyways, putting a billboard on the side of the truck is like free advertising to anyone who drives past it.  Propaganda is the intentional spreading of false information or rumors in order to hurt a persons cause or reputation.  Some companies will use false statistics in order to influence a person away from another company in order to get them to buy their product that may not even be as good.