You can make a table of customer information first, which contains the customer's name, mobile phone, contact number, birthday, address, customer's hobbies, customer's consumption records, comments and so on. You can search Baidu documents, and you should be able to find the relevant forms of VIP customers. When you ask the customer to fill it out for the first time, the customer may not be able to fill it out completely, but you must fill in the customer's name, mobile phone and birthday, because if you grasp these three points, you can send a small gift on the customer's birthday, and you can send a text message to inform the customer when the new goods arrive. You can improve your customers' hobbies and consumption records by yourself.
Generally, this is a form at first, but companies that make VIP systems will use system software, and their contents will be marked in detail. Even when the customer's birthday comes, the system will automatically send a message to the customer to inform the customer to collect a small gift from the store. Usually, when new goods arrive or there are any promotional activities, they are mostly sent by SMS group sending system software or manually.
I hope my answer can help you.