SMS marketing is a form of mobile marketing that involves sending text messages to potential or existing customers. These messages can include promotions, discounts, reminders, and other information. SMS marketing can be an effective way to reach customers directly on their mobile devices, as text messages have a high open rate compared to other forms of communication. It can also be used for appointment reminders, order confirmations, and customer service. SMS marketing campaigns can be set up and managed through a variety of SMS marketing platforms and can be targeted to specific segments of a customer base.