If you've ever worked in the hospitality industry, waiting tables, tending bar, carrying luggage, etc., you've probably depended on tips from your customers to make ends meet. Many people who haven't worked in this industry don't realize that servers, guides, drivers, and others who help make our dining, traveling, and other service experiences nicer, sometimes aren't paid even minimum wage by their employers. They depend on the gratuities that their customers give them for good service and friendly help. Although tipping is a multi-billion dollar industry, it isn't a globally consistent phenomenon. If you're traveling to another country, you'd better read up on its tipping customs or you may end up humiliating your waiter or angering your valet!

In this article, we'll look into the custom of tipping, how it got started, how much we should tip for different services, and examine research that has been done on what makes us tip more (or less) than usual.