That depends for a industrial or consumer wise.
Advertisements that are suitable for growth stage are samples of the good or product given for consumers to try. (If a good or product is in the need category, it will be popular effortlessly)
At growth: sales increase thus, an option for a product to change for the better: size, price, quality, neatness. (Doing so will beat competition)
Media research: helps to showcase your product on the web and that attracts customers.
Market intelligence: helps customers to gain an understanding of a product: details, needs, terms of use.
Opinion & attitude research: comes after market intelligence to question customers' opinions and thoughts and feelings about the product.
As far as it goes; asking yourself " is product worth the time and money?" " are customer satisfied" " does my product look suitable?"
Are very important questions.