One of the essential aspect in medical education is feedback, which helps in enhancing teaching and training  in the right direction by directly observing the trainee/student by the teacher. A good feedback is known to bring  about the desired change in the trainee; while at the same time a poorly given feedback may do the opposite.  Interactions with students calls for sensitivity, observations, calibrations, and choosing the appropriate words.  Medical teachers must know the basic principles of giving effective feedback. It requires preparation in terms  of timings and words and should be supportive and sequential process. Many methods have been described for  giving feedback, each having its own merits and de-merits. We describe here some principles of feedback, merits  and demerits. Any of these can be adopted depending on the needs of learner and teacher. A constructive and  effective feedback can help the learner in achieving the required skills and enhance learning and the learning  process.