SMS marketing, also known as text message marketing, is a form of digital marketing that utilizes short message service (SMS) to send promotional messages and advertisements to a targeted audience. This form of marketing allows businesses to directly communicate with their customers through their mobile devices, providing them with timely and personalized information about products, services, and promotions. With the widespread use of smartphones and the convenience of text messaging, SMS marketing has become an effective and efficient way for businesses to reach and engage with their customers, ultimately driving sales and building brand loyalty.