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The meaning of 短信平台的作用 in English is the function of SMS platform.
SMS platform refers to a system that enables the sending and receiving of short text messages for various purposes, such as marketing, notifications, reminders, etc. The function of an SMS platform is to provide a convenient, efficient and cost-effective way to send and receive messages, enabling businesses or individuals to communicate with their customers, employees or other relevant parties.
In English, you might also hear related terms like "text message marketing" or "SMS marketing" which refer to using SMS platforms for marketing purposes.