Keywords · Product · Retention · Updated 2026-07-21

What is Monthly Active Users (MAU)?

Short answer: The count of unique users who take a meaningful action in a product within a rolling thirty-day window.

Definition

The count of unique users who take a meaningful action in a product within a rolling thirty-day window.

Why it matters for growth

MAU is the most common headline scale metric for consumer products, but it can mask a shrinking engaged core if not paired with DAU.

Example

A social app reports 50 million MAU to investors while internally also tracking DAU to watch for declining engagement depth.

FAQ

What is Monthly Active Users (MAU)?
The count of unique users who take a meaningful action in a product within a rolling thirty-day window.
Why does Monthly Active Users (MAU) matter for growth?
MAU is the most common headline scale metric for consumer products, but it can mask a shrinking engaged core if not paired with DAU.
What is an example of Monthly Active Users (MAU)?
A social app reports 50 million MAU to investors while internally also tracking DAU to watch for declining engagement depth.
What is Monthly Active Users (MAU)? Definition and growth use · Cofounderbase