The McDVoice survey is an online feedback platform by McDonald's that allows customers to share their dining experiences. By participating, you help McDonald's improve its services and menu offerings. To join the survey, visit mcdvoice.com survey. You'll need a recent McDonalds receipt with a survey code printed on it. Enter the code and follow the prompts to answer questions about your visit. Once completed, you'll typically receive a validation code for discounts or free menu items on your next purchase. Its a quick and easy way to share your feedback while earning rewards for your opinions.