You pay big brands to advertise for them!
Do you feel happy after buying a shirt which has a big logo of a company?
I know you feel very happy.
Well this is how they do it. They sell us their $ 100 t-shirt with their logo on the front. We feel so happy after buying it, and then we wear that shirt to our school. We tell our friends that we bought the shirt of the XYZ brand. Everyone who crosses us looks at the t-shirt and the logo of the company. When people look at the shirt they become aware of the logo and they ultimately develop a liking for the t-shirt, and they again pay the company a $100 t-shirt to give them an opportunity to market their brand.
This is how we all work to develop a big brand. Happy branding!