McDonalds conducts Mcdvoice survey in the official web-site where customer insights from the Survey questions will be received by the McDonalds USA restaurants to understand & satisfy customer needs and behaviour. These customer findings obtained by logging into its survey site : www.mcdvoice.com . The 7 days from the date of purchase is given to Customers who participates in the surveys are eligible to win free sandwich on their next visit (Complete the survey from here). However McDonalds restaurants understands the satisfaction level from the provided insights & serves highest quality food, services to serve better.
