Do you have trouble understanding what the heck the difference is between Marketing, Advertising and Public Relations? I know I certainly do. Here's a quick analogy to help you differentiate:

If a young man tells his date she's intelligent, looks lovely, and is a great conversationalist, he's saying the right things to the right person -- that's marketing. If the young man tells his date how handsome, smart and successful he is -- that's advertising. If someone else tells the young woman how handsome, smart and successful her date is -- that's public relations.

Also, here's some fun, dating-related graphics that'll also help you differentiate.