An effective trainer requires strong facilitation, communication, and interpersonal skills. They must be able to analyze group processes, give and receive feedback, and use skills like paraphrasing, summarizing, asking questions, and interpreting non-verbal cues. As a trainer, they may take on roles like a subject matter expert, facilitator, manager, and group leader. Regardless of their role, skills like planning, communication, handling difficult situations, and decision making are important. Beyond technical skills, qualities like enthusiasm, flexibility, humor, and accepting responsibility are traits of a good trainer.