Bets = Number of selections provided
SR% = Percentage Success Rate. i.e. number of profitable selections / number of selections
Staked = Total amount risked on selections, based on amounts entered by the tipster (e.g. a 10 point bet placed at odds of 4/1 would be a stake of 40 points as that is the amount you'd lose if the selection won the race).
Profit = Total points profit/loss. For 2008 onwards Betfair Starting Prices are used. For years prior to that, odds of 15% above SP are used. The figures assume a commission rate of 5% on all winning bets. This is an upper amount and will reduce the more bets you place with Betfair. You can see the effect of varying the assumed commission % by looking at the Full Proofed Results (see link above).