What is tip added to the bill?

A tip added to the bill is an extra amount of money given to service staff, such as waiters or bartenders, as a token of appreciation for their service. It is typically calculated as a percentage of the total bill, often ranging from 15% to 20% in restaurants. In some places, a service charge may be included in the bill, which serves a similar purpose. Tips can vary based on the quality of service received.