Why do companies spend money on Advertising? What's a commercial you like and why?

Big brands continue to increase their outdoor advertising spend because it helps them achieve their objectives, which includes communicating with their customers. This is one of the reason that sets them apart from their competitors and thus spending a hefty amount of money justifies their goals

the best commercial is nike because there are many footballers in that ad

answer; (cash) is the best out of the above; good luck