Gambling is an activity in which people stake something of value, such as money or property, for the chance of winning a prize. It can be done in casinos, racetracks, and other entertainment venues, or on the Internet, where it has become increasingly common. In some cases, gambling can lead to serious financial and psychological problems for individuals and society as a whole.

It has been a popular pastime for centuries, but it has also been banned in many areas. Supporters of gambling point out that it attracts tourists, which can help revive local economies. They argue that restrictions simply divert business to illegal gambling operations and other regions that allow it. In addition, they say that tax revenue from gambling can help support local government services.

Opponents of gambling note that it can be addictive and destroy the lives of people who have a problem. They argue that the societal costs of gambling are greater than economic benefits, and that governments should not subsidize the activity. Mental health professionals have developed criteria for identifying people with gambling disorders, and the latest edition of the Diagnostic and Statistical Manual of Mental Disorders lists gambling addiction as a mental illness.

People who gamble often do so to relieve unpleasant emotions, such as boredom or loneliness, or to make extra money. Behavioral therapy can teach people healthier ways to relieve these feelings, such as spending time with friends who do not gamble, exercising, or practicing relaxation techniques.