The Signal Event action means you may 'Cancelled' and/or 'Recalled' this workflow, and which allows you to add and connect below 5 actions depending on your workflow requirement.
You MUST tick at least one or both events(Cancelled/Recalled) to process.
Task Actions: Assignment Task/Claim Task
Send Email
Set Variable
Set Content List
HTTP Request
You don't need to add an ending action (End or End with Rejection) as they don't not take effective on the trigger event.
