A focus group is a carefully planned discussion aimed at obtaining perceptions on a defined topic. It involves gathering a small group of people together to discuss a topic guided by a moderator. Focus groups are effective for understanding human behavior and motivations when participants feel comfortable sharing their views and opinions. They produce qualitative data that can help indicate a range of views, though results cannot be generalized to the wider population. Successful focus groups require careful planning, participant selection, skillful moderation, and meaningful questioning to effectively capture and analyze the discussion.