The document defines marketing research as the systematic gathering, recording, and analyzing of data about marketing problems to provide useful information for marketing decisions. It then lists different types of marketing research including product, advertising, motivation, and sales research. The document goes on to describe several specific types of marketing research in more detail such as product research, concept testing, branding research, and advertising research. It also outlines the six main steps of conducting marketing research: defining the problem, situational analysis, informal investigation, formal investigation, data analysis and interpretation, and preparing a written report. Finally, it discusses some limitations of marketing research.