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A surebet (also called arbitrage bet or arb) is a situation where you can bet on all possible outcomes of an event across different bookmakers and guarantee a profit regardless of the result, by exploiting differences in odds.

They are the same concept. Surebet is the more common term in European markets, while arbitrage betting is the more technical/American term. Both involve backing all outcomes across different bookmakers for a guaranteed profit.

Typical surebet opportunities offer 1-5% ROI. Higher margins are rare and tend to disappear quickly. Even small percentages can be profitable with larger investments and high volume.

While surebetting is legal, bookmakers may limit or close accounts of suspected surebet bettors. Using multiple accounts, varying stake sizes, and mixing surebet activity with regular bets can help reduce detection risk.