Average revenue per user (ARPU) is a commonly used business metric that calculates the average amount of revenue generated by a company per individual user or customer within a specific period of time.

ARPU is calculated by dividing the total revenue generated by a company during a given period by the total number of users or customers during that same period.

ARPU can be a useful metric for businesses to track over time, as it can provide insight into changes in customer spending habits, the effectiveness of marketing and sales strategies, and the overall health of a company's revenue streams.