Any idiot can sell a product with a discount. This type of sales offer does not require marketing or branding investments. Instead, marketing aims to sell a product at a higher price than competitors.
You must fire a marketing manager who requests a discount campaign. He is unaware of his function in the organization and doesn't know what makes a sales campaign different from marketing.
Sales campaigns include promotions such as discounts, coupons, and buy one, get one free. I don't say these are not important. I mean that these are not a product's value proposition. Marketing focuses on the unique value proposition.
Remember the first sentence:
"Any idiot can sell a product with a discount."