When searching for the best site for free bets, look for platforms that offer generous promotions, a user-friendly interface, and a wide range of betting options. Websites like Betfair, Bet365, and William Hill often provide enticing welcome bonuses and ongoing promotions for both new and existing users. Additionally, ensure the site is licensed and regulated for a safe betting experience. Reading user reviews and comparing odds can also help you find the best value for your free bets, maximizing your chances of winning without risking your own money.