What are the conditions for tipping abroad?

In Europe and America, you don't have to tip. Tipping actually means that you are very satisfied with the service and give you an extra reward. If you think the service provided by the other party is satisfactory, you should tip. If you think the service provided by the other party is not satisfactory, you don't have to tip, and people won't force you to ask for it. In addition to voluntary tipping, in some countries in Europe and America, some businesses have included tipping when charging, so some businesses will directly say that our store does not accept tipping, so as to attract some customers!