TTAG Systems uses Twilio to build communication experiences for its clients, such as mobile coupons with custom QR codes, city-wide advertising campaigns tracked by SMS engagement, and in-store SMS surveys. The company leverages the granularity of MMS and SMS to collect high-quality data on individual customers, allowing them to personalize their experience and improve sales. By reaching customers through a familiar channel like text messaging, TTAG Systems increases conversation rates compared to other methods. This approach enables the company to build a better customer experience and achieve success for its clients.