What do you mean by zero purchase?

When some friends shop online, they will find that many things can be bought for zero yuan, and even many goods will be mailed to customers. This is a great benefit for many friends. In addition to the benefits of buying classes, businesses and customers will also win. So what does zero yuan mean? Zero purchase means shopping without spending a penny, that is, the purchased goods are free. Under normal circumstances, zero purchase is more common in online shopping platforms. In the early stage of operation, many merchants will give some goods to customers in order to make their stores famous, increase sales and improve evaluation, which is equivalent to giving them to customers for free.