Yes, betting on UFC (Ultimate Fighting Championship) fights is legal in many parts of the world, including the United States, where it is regulated on a state-by-state basis. Sports betting on UFC events typically involves placing wagers on the outcome of fights, as well as various props (proposition bets) such as the method of victory, the round in which the fight will end, or the total number of rounds.

To bet on UFC fights, you would generally follow these steps:

1. **Check the Legality**: Ensure that sports betting is legal in your jurisdiction and that you are of legal age to participate.

2. **Choose a Sportsbook**: Select a reputable sportsbook or betting platform where you can place your bets. There are many online sportsbooks as well as physical locations where sports betting is offered.

3. **Create an Account**: If you’re using an online sportsbook, you’ll need to create an account, which typically involves providing personal information and verifying your identity.

4. **Fund Your Account**: Deposit money into your sports betting account to have funds available for placing bets.

5. **Research**: Before placing a bet, it’s wise to research the fighters, their recent performance, styles, and any other relevant information that could affect the outcome of the fight.

6. **Place Your Bets**: Decide on the type of bet you want to make (e.g., moneyline, over/under, prop bets), choose the event and fighter(s) you’re betting on, and place your bet.

7. **Wait for the Outcome**: Once the event has concluded, the sportsbook will settle your bets based on the results.

Remember that sports betting should be done responsibly. It’s important to only bet what you can afford to lose and to be aware of the risks associated with gambling.