This document discusses different types of research designs used in marketing research. It describes exploratory research as aiming to generate initial insights, while conclusive research aims to verify insights and select a course of action. Descriptive research deals with quantifiable information like common diseases, while experimental research examines cause-and-effect relationships. The key research designs are exploratory, descriptive, and causal (experimental). Exploratory research uses techniques like interviews, focus groups, and case studies for insight generation, while descriptive and causal/experimental designs employ surveys, panels, and experiments to describe populations or test hypotheses.