Tipping customs vary widely around the world, often reflecting local culture and service expectations. In the United States, it is customary to tip service workers, such as waitstaff and taxi drivers, around 15-20% of the total bill. This practice is seen as a way to reward good service and supplement workers' incomes. In contrast, some countries, like Japan, discourage tipping altogether, as excellent service is considered standard. In these places, leaving a tip may be viewed as rude or unnecessary. Understanding these customs is important for travelers to show respect for local traditions and avoid misunderstandings.