You can send automated replies to your clients who will provide their phone number. Also can send bulk SMS to your created/uploaded phone numbers list.
Integration Procedure
First of all please go to the menu Broadcasting then click actions of the SMS API settings section.

Now you’ll be in the SMS API integration panel. Click the New API button. A popup window will appear to put all the necessary information. Please watch the below video playlist about how to get all the information. You can also click the instructions button to gather knowledge.

Activation SMS API Integration Playlist
See below for the playlist of how to integrate the different SMS APIs.