Gratuities, commonly known as tips, are small amounts of money given to service workers as a token of appreciation for their service. They are often given in industries such as hospitality, food service, and personal care. The amount can vary based on the quality of service, with common percentages ranging from 15% to 20% of the total bill. In many cultures, gratuities are an important part of a worker's income, as base wages may be lower than in other professions. Some establishments, like restaurants or hotels, may include a service charge in the bill, which can affect how gratuities are calculated and given.