To start the McDonald's survey, visit the official website mcdvoice.com survey. This survey allows you to provide feedback on your recent McDonald’s experience. First, ensure you have a valid receipt from your visit, as it contains the necessary survey code. Go to www.mcdvoice.com and enter the 26-digit survey code or store details if the code is unavailable. Answer the questions honestly, rating your satisfaction with food quality, service, and cleanliness. Once completed, you may receive a validation code for a discount or free menu item on your next visit. This survey helps McDonald's improve customer satisfaction.