Online Gambling is a general term for gambling using the Internet. This article provides a brief introduction to some of the forms of online gambling, as well as discussing general issues.
Typically, gamblers upload funds to the online gambling company, make bets or play the games that it offers, and then cash out any winnings. European gamblers can often fund gambling accounts by credit card or debit card, and cash out winnings directly back to the card. However, most US banks prohibit the use of their cards for the purpose of internet gambling, and attempts by Americans to use credit cards at internet gambling sites are usually rejected. A number of electronic money services offer accounts with which online gambling can be funded. However, many top fund-transfer sites such as FirePay, Neteller & Moneybookers have discontinued service for U.S. residents.
I enjoy some of the games and some sites do offer free downloadable slot machines that you can play right on your PC. It's a fun way to pass the time if you're bored or fun to play with friends as well. I wouldn't normally admonish that you pay for real if you don't know your limits. It's always wise to know what your capabilities are before you play. Otherwise, I would just say - download the game and play for fun.