Basics of Flow
Trigger is an essential part of the Automation Flow which drives the Flow. Trigger Menu is where you can edit the name of the Flow and Add a Trigger.
User Created Trigger
The User Created Trigger is present inside the CRM that listen to any new User created. When a certain User is created the Trigger gets Triggered and a certain task can be performed by the Automation Flow. In this case the Flow sends a Greeting email automatically when a certain User is created.