Online casinos offer various bonuses to attract and retain players. Common types include welcome bonuses, which reward new players with extra funds or free spins upon registration; no-deposit bonuses, allowing players to try games without an initial deposit; and reload bonuses, which provide additional funds on subsequent deposits. Other incentives include cashback offers, where players receive a percentage of their losses back, and loyalty programs that reward frequent players with points redeemable for bonuses or prizes. These bonuses enhance the gaming experience and increase winning potential.