You see gorgeous girl in party, you go to her & say I am rich marry me That's Direct Marketing.You attend party & your friend goes to a girl & pointing at you tells her.He' is very rich, marry him.That's Advertising.Girl walks to you & says you are rich,can you marry me?..."That's Brand Recognition"You say I m very rich marry me & she slaps you."That's Customer Feedback"You say I m very rich marry me & she introduces you to her husband."That's Demand & Supply Gap"Before you say I m rich, marry me,your wife arrives.That's Restriction from Entering NewMarket