Here are some key metrics that you can use to measure and optimize the success of your outbound SMS campaigns:
SMS delivery rate per message: Select 'Logs' in the left-hand menu to view all sent messages. You’ll also be able to view the delivery rate for individual messages here.
Click-through rate: If you used a shortened URL in your SMS, you’ll be able to see the number of clicks received on that link by navigating to Tools -> Short links. Your click-through rate (CTR) is calculated by taking the number of clicks or messages delivered multiplied by 100. If the objective of your campaign was to drive your subscribers to a web page, the CTR will give you an indication of how successful the content of your message was in achieving that objective.