Online gambling sites use several technologies to function:
Random Number Generators (RNGs): RNGs ensure the fairness and randomness of games like slots, blackjack, and roulette by generating unpredictable outcomes.
Secure Payment Gateways: These process transactions and ensure the secure transfer of funds between players and the site using encryption technology.
Live Streaming: For games like live poker or sports betting, live streaming technology allows users to participate in real-time events.
Mobile Optimization: Many platforms offer mobile apps or responsive websites to allow users to gamble on their phones.
Geolocation Software: Some sites use geolocation to confirm a user’s location to comply with regional regulations.

In online gambling, odds and payouts are determined by a combination of mathematical models and house edges:
Casino Games: Each game has a predefined house edge, which ensures that the casino has a slight advantage over time. However, individual outcomes are random.
Sports Betting: Odds are calculated by bookmakers based on the likelihood of an event occurring. These odds determine the payout a player will receive if they win. Higher odds indicate a lower probability of success, but a larger payout.
Payout Ratios: The payout ratio is the percentage of winnings that the site returns to players. For instance, a slot machine may have a payout ratio of 95%, meaning that for every $100 wagered, $95 is paid out in winnings over time.

Online gambling sites offer a variety of payment methods to make deposits and withdrawals:
Credit/Debit Cards: Visa, Mastercard, and other major cards are commonly accepted.
E-Wallets: Services like PayPal, Neteller, and Skrill are popular for fast and secure transactions.
Bank Transfers: Direct bank transfers are also accepted but can take longer to process.
Cryptocurrencies: Some sites accept Bitcoin and other cryptocurrencies for anonymous and fast transactions.
Prepaid Cards: Cards like Paysafecard allow users to deposit funds without sharing bank details.

Online gambling sites ensure fair play by:
Random Number Generators (RNGs): RNGs are used in casino games to guarantee randomness and fairness.
Third-Party Audits: Many gambling platforms are regularly audited by independent organizations such as eCOGRA or iTech Labs to verify the fairness of their games.
Licensing and Regulation: Licensed sites must adhere to strict rules regarding game fairness, security, and transparency set by regulatory bodies like the UK Gambling Commission or Malta Gaming Authority.
Transparency: Legitimate sites often provide information on the house edge or Return to Player (RTP) for each game, so players know what to expect in terms of odds.

Online gambling platforms typically offer a wide variety of games, including:
Casino Games: These include classic games like slots, roulette, blackjack, poker, and baccarat. Many platforms also feature live dealer games where players can interact with a real dealer via video stream.
Sports Betting: Players can place bets on a wide range of sports, from football and basketball to horse racing and esports.
Poker: Many platforms host online poker tournaments and cash games, with different variations like Texas Hold’em and Omaha.
Lotteries and Bingo: Some sites offer lottery-style games and bingo.
Esports Betting: Betting on video game competitions, known as esports, has become increasingly popular on many platforms.
Each type of game or betting market operates with different rules, but all are designed to offer players an engaging, fair, and secure experience when using licensed and regulated platforms.