Advertizing is very important to big companies. They want to make sure that you know their brand, because if you dont, that means that the company is not a successful one. there is tons of competition  for example, there is Mcdonalds and Burger King,Apple and Samsung and there is Nike and Adidas. Nike’s advertising are the most effective because they do their best and pay so much in advertising  to make you buy their product. They make you feel that if you didn't buy their product, you are not athletic and you can't be professional at the sport you play. In the advertizing below, it shows you that Cristiano Ronaldo is good because of his shoes and when Rafael Nadal tries to do soccer moves he could because he is wearing Cristiano Ronaldo’s shoes.