Focus groups are a qualitative research technique used to gather insights into attitudes, behaviors, and perceptions. They involve a small group of carefully selected individuals who discuss a given topic under the guidance of a moderator. There are various types of focus groups, including dual-moderator, mini, and online focus groups. Conducting effective focus groups involves identifying the purpose, defining the target audience, developing open-ended questions, recruiting participants, conducting the session, and analyzing the results. They provide benefits such as stimulating discussion and new ideas, but also have disadvantages like not being representative and potential distortion from dominant opinions.