How can I prove that advertising GREATLY influences in shaping consumer's purchase decision?

Question

So far, I have peer pressure, discounts...I'm not sure if they're even strong ideas :?

Answer 1

To prove that advertising GREATLY influences consumer's decisions, you'd need to cite studies showing the purchases made for products that weren't advertised were less than for products that were heavily advertised.

Answer 2

ok, that will help me with my proofs, but I need ideas on what points to use...