We can introduce WhatsApp Business as a service application provided by WhatsApp for business. It is a completely free service and includes a number of features required for business.
About a month ago, the Wabetainfo website posted a hint about a subscription plan for WhatsApp. As a confirmation, it was reported last week that it is officially ready to launch as WhatsApp Premium.
Generally, the multi-device feature can only connect up to 4 devices, but the WhatsApp Business app can connect up to 10 devices through the subscription plan.
The service also offers a number of other features, including the ability to get a custom URL for your WhatsApp Business Profile. However, this subscription plan is an optional feature for WhatsApp Business only, and pricing and other details have not yet been reported.
Source: WABetaInfo and TechNews