Abstract: In second language learning, feedback refers to the evaluative information available to learners concerning their linguistic performance. The concept and types of feedback, the role it plays in second language learning and the characteristics of effective feedback are analyzed. The feedback will be most valuable when done judiciously, appropriately focused, with the consideration of the limitation of learners’ cognitive resources, in an affectively supportive manner. The pedagogical implications of the research on feedback and the areas for future studies are also discussed

Key words: feedback, second language learning, interaction