To enable SMS notifications, merchants need to integrate SMS gateway services into their Magento 2 store. Additionally, merchants must ensure that customers' phone numbers are captured accurately during the registration or checkout process. Configuration settings for SMS notifications, including message templates and event triggers, should be customized according to the merchant's requirements. Furthermore, compliance with data protection regulations and obtaining consent from customers to receive SMS notifications are essential considerations. By fulfilling these requirements and leveraging the necessary resources, merchants can effectively implement SMS notification functionality within the Magento 2 platform.