Platform Events Developer Guide

Delivering Custom Notifications with Platform Events
Event-Driven Software Architecture
Enterprise Messaging Platform Events
Defining Your Platform Event
Publishing Platform Events
Subscribing to Platform Events
Considerations and Testing
End-to-End Example Using a Process and a Flow
Reference
PDF

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Delivering Custom Notifications with Platform Events

Use platform events to deliver secure and scalable custom notifications within Salesforce or from external sources. Define fields to customize your platform event. Your custom platform event determines the event data that the Lightning platform can produce or consume.
Available in: both Salesforce Classic and Lightning Experience
Available in: Performance, Unlimited, Enterprise, and Developer Editions

Platform events are part of Salesforce’s enterprise messaging platform. The platform provides an event-driven messaging architecture to enable apps to communicate inside and outside of Salesforce. Before diving into platform events, take a look at what an event-based software system is.