Monthly Active User (MAU) for the SDK/Live Chat will be defined as several unique users who sent or read the live chat message in that particular month. This means we will only consider the users active if they have actually sent or read the messages received.
For WhatsApp Business API, Monthly Active User (MAU) will only be counted when the client is sent or replying to your message.
You can find your app's current MAU by visiting Qiscus Dashboard.