Execution type
With this task you could define tasks, which will only be executed if the workflow is started automatically/manually.
Example
You have a organization workflow, which will wait 7 days after creation of a new organization and after this time, send an email to the customer. If you would have the option to send this email manually directly in the Workflow sidebar, without waiting 7 days you could integrate the delay in the path of the automatically execution. View the example workflow here