Evaluation of service delivery is an important aspect of nursing practice. Service evaluation is being increasingly used and led by nurses, who are well placed to evaluate service and practice delivery. This article defines evaluation of services and wider care delivery and its relevance in NHS practice and policy. It aims to encourage nurses to think about how evaluation of services or practice differs from research and audit activity and to consider why and how they should use evaluation in their practice. A process for planning and conducting an evaluation and disseminating findings is presented. Evaluation in the healthcare context can be a complicated activity and some of the potential challenges of evaluation are described, alongside possible solutions. Further resources and guidance on evaluation activity to support nurses’ ongoing development are identified.