If the camel circus is coming to town and you paint a sign saying, "Circus is coming to Dubai," that's Advertising. If you put the sign on the back of a camel and walk it through town, that's a Promotion. If the camel walks through the Sheikh's flower bed, that's Publicity. If you can get the Sheikh to laugh about it, that's Public Relations. And, if you planned the whole thing, that's Marketing!