Platform Events are just like another custom object that is used to connect External sources through Business Processes in Salesforce.
Consider a scenario where an app in salesforce notifies to an external app and in another one where an external product app notifies Salesforce for completion of manufacturing. So here salesforce and external system communicate through Platform event messages.
Platform Events are part of the salesforce enterprising messaging platform and this platform provides an Event-driven architecture that enables the app to communicate inside and outside of Salesforce. Continue reading