From my points of view, advertising is Huge. Huge contribution to the the world. It gives knowledge to a products, gives direction to the consumers. When doing a business, to promote your business, well definitely you needed a business card. That card is "Advertising". It is just like Advertise your business without you telling to the customer what business you are doing.
In a very same ways, 'Small things give a Big impact', that advertising all about.