High repurchase rate means that consumers buy more products or services of this brand, which reflects consumers' high loyalty to this brand. There are two ways to calculate the repeat purchase rate. One is the number of times that all customers who have purchased the product have repeatedly purchased the product as an independent unit. For example, if there are 10 customers who have purchased the product and 5 customers have purchased it repeatedly, the repeat purchase rate is 50%. The second algorithm is the proportion of the total number of repeated purchases per unit time. For example, there are 10 customers who bought the product, among which 3 people bought it for the second time, and 1 of these three people bought it for the third time, so the number of repeated purchases is 4, and the repeated purchase rate is 40%. Direct and complicated recommendation enterprises adopt the first algorithm.