The Sender ID is the name of the person or company that is sending the SMS. For example, you want to send SMS in bulk from your company’s name, from a specific brand or your name, or any other name or number.
You can choose between a name that already exists or create a new one, just click on the box or write down the name, all these you can do at Campaigns while creating new SMS Campaign.
NOTE! Sender ID should be an alphanumeric string (16 characters maximum).