Brainstorming is a technique used for problem-solving, team-building, and creative processes. It involves a group generating ideas without criticism to solve issues or develop new ideas. For brainstorming to be effective, it must be structured with clear objectives, time limits, and rules. The facilitator's role is crucial to manage the process, ensure participation, and categorize ideas. Following brainstorming, the group prioritizes options, agrees on actions and timelines, and monitors follow-up to achieve results and motivate continued participation.