1. It is useful. 2. Because opening a through train on Shopee can increase the exposure and sales of the store, the through train ads can be displayed on the Shopee platform, attracting more users to click and buy, thereby increasing the store's revenue.

3. Opening a through train can help stores stand out in a highly competitive market and increase product exposure and sales. At the same time, the through train also provides data analysis and optimization functions, which can be adjusted and optimized according to the advertising effect, further improving the advertising effect and the store's sales performance.