Feedback may be described as a process comprising communication of information and reactions to such communication. It has been defined as specific information about the difference between a trainee's observed performance and a given standard with the intent of achieving performance improvement. Feedback is essential in medical education and has great implications for the educational climate. It has been shown that a common language regarding the principles of feedback has a sustained effect on quality and frequency of feedback. Further research is needed on feedback and educational climate, and on how to motivate trainees to improve future learning through feedback.