Question

how advertising creates discrimination in society

Answer 1

creating violence
creating wrong information

Answer 2

high quality products shown in advertisements are of high price so the people of high class can afford that as it is good in nutrition, etc.
whereas, the products that are not of good quality are not of good quality so they are not advertised and are of cheaper price. the poor people have to buy because they cannot afford the one of good quality.
so, in this way advertisements also lead to discrimination