The article discusses classical approaches to marketing research before the digital era. It aims to categorize the stages of marketing research development, outline goals and methods of marketing research, and classify marketing research in the pre-digital economy. By conducting marketing research, businesses can gather reliable information about market demand, competition, industry trends, and more, leading to more effective communication and decision-making. The results of marketing research depend on the research goals and can be categorized as search, descriptive, experimental, or innovative. The paper proposes a classification of marketing research based on existing approaches and suggests future updates to adapt to the digital economy.