The Longboard Store implemented a system to send in-stock reminders to customers via SMS using Twilio's SMS API, offering an additional way to engage with customers on mobile devices. The system allows customers to sign up for notifications when their desired items are back in stock through email or SMS, and provides a confirmation process to ensure the customer is informed. After launching the system for three months, the company analyzed the results and found that it led to higher conversion rates compared to traditional email-based reminders, with an 11.75% conversion rate from sign-ups, significantly above their overall conversion rate. The success of this system has made it a growing part of their strategy to connect with customers on mobile devices.