It is the control that allows sending SMS in the flow.
Send SMS control icon at Flow Tools
How it looks like on the Canvas
This control has a Connection at the end of the control. Resource result of the Connection must be chosen as No Requirement.
Text: The text that appears on the screen is written here.
SMS Message: The content of the message to be sent is written.
Numbers to Send: The numbers to be sent are written as 10 digits with a comma between them.
This example has a Send to Approval and Send SMS. According to the example, when the document is approved, SMS is sent to numbers in the control. The control makes the SMS sends to a phone.
SMS Message is written below.
Numbers of phones are added in the Numbers to Send area as below.