Twilio SMS is a service provided by Twilio that enables developers to send and receive SMS messages through their applications. It is highly scalable and reliable, making it a popular choice for businesses that need to integrate SMS functionality for notifications, alerts, and communication with customers. Twilio SMS supports global messaging with features such as delivery status tracking, message queuing, and compliance tools to meet local regulations. Its API is easy to integrate, allowing businesses to add SMS capabilities to their applications quickly. Twilio's platform is scalable, handling high volumes of messages with reliability.