Length

The duration between the customer’s first and last purchase.

It indicates the relationship span of the store and the customer. Moreover, this KPI helps you understand customer’s loyalty with respect to his/her engagement with time. The longer duration suggests that the customer preferred to purchase from your store even after all this time.

The case rests the same in the context of products. The longer duration for a product’s length suggests that the product is still being preferred by the customers and hasn’t lost its charm. 

Note: New Customers who purchased only once or products bought once from the store will have Length = 1.