Why is there a tip in restaurant service? What is a tip?

tipping refers to a form of reward for customers to thank service personnel in the service industry. Originated from London, England in the 18th century, there was a bowl with the words "to insure prompt service" in the middle of the dining table of the hotel. Customers will get prompt and thoughtful service from the hospitality staff when they put the change into the bowl. Join the first letters of the above English words to become tips, which translates as tips. About 5% to 25% of the total expenditure.