Nursing audit is a review of clinical records to evaluate the quality of nursing care. It has several purposes, including evaluating nursing care provided, achieving quality standards, and contributing to research. There are two main methods: retrospective review examines past patient records, and concurrent review evaluates current patients. The nursing audit cycle involves defining standards, measuring current practice, identifying gaps, implementing actions, and reviewing standards. Benefits include assessing all involved in record-keeping and identifying areas for improvement. Nursing audit results can be used to modify care plans, documentation, education, and resource allocation.