‘Advertising is a weak force’: Busting CPG marketing myths

Contemporary art collage. Human hands with megaphones. Giant sales season,big shopping, price reduction. Colorful design. Concept of shopping, sales, Black Friday, creativity. Banner, ad
"Buyers are not considering or evaluating all brands in the market. They search for brands in their brains - so, what we know has an impact on what has a probability of being bought..." (Getty Images)

Does spending more improve sales? Why do brands fail? Do consumers ever go back to weak brands?