Betfair is a bit unique compared to traditional bookmakers because it offers both standard markets and a betting exchange where you can bet against other players as well as against the house. You can find a detailed look at how it works, the markets it covers, and what features it offers here Betfair https://vodds.com/bookmakers/betfair/ . That resource lays out things like exchange mechanics, available sports, and how Betfair’s interface and odds compare with other platforms.