A focus group is used to gain insights from a target market. It consists of 8-12 similar participants who have not participated in many focus groups. The relaxed environment lasts 1.5-2 hours while recording facial expressions and body language. A moderator leads the discussion and stimulates interaction. The moderator must understand the client's business and objectives, and guide the discussion at an intelligent and emotional level. Steps include specifying objectives, developing questions, screening participants, conducting the focus group, reviewing data, and summarizing findings. Advantages include synergism, spontaneity, and flexibility, while disadvantages include potential for bias and lack of representativeness.