Daily Active Users (DAU) is a metric used in software as a service (SaaS) businesses to measure the number of unique users who actively use the product on a daily basis. DAU is a key performance indicator (KPI) for SaaS companies because it provides insight into customer engagement and usage patterns, which can help inform business decisions around product development, marketing, and customer support.
By tracking DAU over time, SaaS companies can better understand the growth and success of their product and make informed decisions about future investments.