What does it mean for old outdoor marketing users to apply for SMS verification code?

Outdoor marketing refers to the promotional activities carried out by enterprises or organizations in outdoor places, including billboards, outdoor advertisements, exhibitions, street promotions and other forms. "Old user marketing" refers to the promotion activities carried out by enterprises or organizations for old customers who have already purchased products or services, aiming at improving customer satisfaction and loyalty and increasing the repurchase rate of customers. "Handling SMS verification code" here means that enterprises or institutions need customers to enter SMS verification code to verify their identity when marketing old users, so as to ensure the security and accuracy of information. After the customer enters the correct SMS verification code, the enterprise or organization will recommend the corresponding products or services according to the customer's purchase history and preferences, so as to improve the customer's purchase intention and loyalty.