Use the rule engine to determine when the conversations should be assigned to an agent or to a bot. The WhatsApp Integration API enables you to distribute webhooks among different configured recipient users. It does that by communicating with the rule engine to help you determine which message goes to which user. 

You can use your own custom Rule Engine implementation or let the inbox run a Default Rule Engine that assigns messages to users based on Message tagging. For example, you can configure the rule engine so it forwards new messages to a bot which in turn filters spam and add an “agent needed” tag to the new message.