Follow the below mentioned steps to Add Short URL in SMS from DO SMS Panel:
- Click on the Message field
- Click on the "URL Shorten" tab and click on "Add Short URL" option
- Under the Name field, enter a name on behalf of which, the URL will be stored
- Under the URL field, enter the actual URL of the web-page and click on the "Create" button to generate a short URL
- Click on the "Use It" button to add the Short URL in the current message
See our article on the process of creating a custom SMS template: Click Here
See our article on TRAI Rules for Sending SMS : Click Here