Expanding content: In recent years, with the rapid development of e-commerce, SMS marketing has gradually become one of the important ways for merchants to promote and communicate. Short message is widely used in all walks of life because of its advantages of instant information, high transmission rate and high user access rate. However, some users are troubled by the business messages they receive. Therefore, when they receive business SMS, they can choose whether to unsubscribe or adjust SMS push settings according to their personal needs, so as to better manage their information reception.