Ogilvy's law was put forward by Ogilvy & Mather advertising company in the United States, which advocates "serving customers first and pursuing profits second". The law holds that if you regard customers as gods, seize their hearts and take good care of your customers, they will take care of your business and you will gain a bigger market. These words are summed up as a business philosophy of "customer is God".
For marketers, only by treating customers as their own gods will customers buy your account and you can improve sales performance.