Many sellers will not choose the main picture at first, and buyers have no desire to look at the bad main picture, resulting in less clicks and less traffic.
The through train can help us to test whether the main picture can attract buyers' attention. Using the through train to test the main map of water is a common means of Taobao operation.
At this time, replacing the bad master map with the buyer's favorite master map will not only reduce the weight, but even increase the weight of the product.