ACSI, or the American Customer Satisfaction Index, is a nationally recognized measure of customer satisfaction in the United States. It is a comprehensive and independent survey that assesses the opinions of consumers regarding the quality of products and services provided by various companies. ACSI is widely used by businesses and organizations to evaluate their performance and identify areas for improvement in order to enhance customer satisfaction and loyalty. With its rigorous methodology and extensive data analysis, ACSI serves as a valuable tool for both companies and consumers in understanding and improving the overall customer experience.