Send customized notifications when important events occur. For example, alert an account owner if a new support case is logged while trying to close a deal. Or, send a notification for a unique workflow built entirely with custom objects. Previously, you could send only standard notifications for use cases predefined by Salesforce. Notification Builder puts you in control of who needs to know what and when. This change applies to Lightning Experience and Salesforce Classic in Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions and all versions of the Salesforce app
Notify users by adding the Send Custom Notification action to a process in Process Builder.