The biggest betting websites, such as Bet365, William Hill, and DraftKings, dominate the online gambling landscape by offering a wide range of sports betting, casino games, and live betting options. These platforms are known for their user-friendly interfaces, competitive odds, and extensive market coverage. They also provide enticing promotions and bonuses to attract new users. With robust security measures and mobile compatibility, these websites ensure a seamless betting experience for millions of users worldwide, making them leaders in the online betting industry.