To what extent do you think that advertising shapes society?

I have HW(essay) but couldn't begin nor find good support ideas.Whenever I try to write something,it goes like turtle and I can't expand my ides

my topic is 'to what extent do you think that advertising shapes society' ,If you help me,it will be nice for me because English is not my main language and I'm not good at writing especially academical writing.

Well... if you google on this topic you'll find loads of information on this topic.

A few points for this essay;
1. Advertising is powerful in changing peoples'perceptions; this may promote people to buy products with inferior quality too. (when you write give solid examples)
2. Advertising also educate people about new products. services, value addions; this helps people to be more knowledgeable and aware of latest products, services etc.

I have actually heard of young women gaining eating disorders from looking at model advertise in Magazines like Vogue and Instyle. I would start there how does advertisement negatively and positively affect our society. In one instance advertisement may have an adverse affect while others like Red Cross or the "It get's better" campaign have positive affects on society.

I know I should have googled but in my school all essays are checked by a program and If you copy even one sentence,it can catch this.Just I need 2 good supporting idea which can expand really well,you have given me thanks for help !