This document discusses market research and provides information on secondary and primary research methods. It describes various internal and external sources that can provide secondary data, as well as sampling methods like random, stratified, quota, cluster, and snowball sampling. The document also discusses quantitative and qualitative research approaches. It notes that while primary research can provide focused and relevant information, it is also more expensive. The purpose and advantages of market research are outlined as aiding planning and reducing risks, while disadvantages include potential inaccuracies and reluctance to consider results.