What is CSAT?
CSAT stands for "customer satisfaction". The "A" and "T" don't stand for anything, but with "customer support" commonly being initialized as CS, there needed to be another acronym for customer satisfaction. CSAT is often pronounced "see sat", or, as Tim Cook calls it, "customer sat".
CSAT measures the satisfaction of of every customer's interaction with your company's customer support and is used for customer support agent improvement or development. It differentiates from Net Promoter Score (NPS), which measures overall company and product feedback, and Customer Effort Score (CES), which measures overarching feedback about your support process.