WAU, or Weekly Active Users, is a metric that measures the number of unique users who have interacted with a software application or website at least once within a given week. WAU is a key metric for businesses to track as it can provide insights into how engaged users are with the application or website over time.
Example of WAU
An example of WAU might be a social media platform that tracks the number of unique users who have logged in to the platform and interacted with content at least once within a given week. The platform might use this data to measure the engagement of its users over time and identify opportunities for improvement, such as introducing new features or content to increase engagement.
How to calculate WAU
To calculate WAU, businesses can track the number of unique users who have interacted with the application or website at least once within a given week. This can involve using analytics or business intelligence tools to track user engagement metrics, such as logins, clicks, or content interactions.
Weekly Active Users Formula

Why is WAU important?
WAU is important for businesses because it provides insights into how engaged users are with the application or website over time. By tracking WAU, businesses can identify trends and patterns in user engagement and use this data to inform strategies for improving the overall user experience. Additionally, by understanding the factors that influence user engagement, businesses can identify opportunities for improving retention rates, driving revenue growth, and building strong, loyal customer communities.