SMS marketing is a mobile-based strategy that leverages text messaging to engage customers, promote products, and drive sales. Integrated within CRM systems, SMS marketing enables businesses to send personalized messages, appointment reminders, special offers, and follow-ups. Unlike email, SMS has a high open rate, making it an effective tool for immediate engagement. Automated SMS campaigns can be triggered by customer actions, such as a cart abandonment reminder or a loyalty program update. Retail, healthcare, and financial service businesses use SMS marketing to enhance communication, improve customer retention, and drive conversions. With compliance considerations like opt-in requirements and data privacy laws, companies must ensure their SMS campaigns follow best practices.