My friend asked me to pay for something on Taobao. I didn't show it when I entered Taobao, but I received a message. What happened? ...

This is possible. If you buy something and let someone else pay for it, Alipay will send you a message to remind you. If someone asks you to pay, it will show the amount. Because you didn't buy it, it's normal not to show it. He will show it there, but if he is not an acquaintance, it is best not to pay. You should ask clearly to avoid being cheated.