Win rate is the share of settled bets that won. In isolation it is the most abused number in betting marketing: an 80% win rate sounds spectacular and is trivially achieved by backing 1.10 favourites — while losing money. Conversely a 35% win rate is excellent if the average price taken is above 3.00.
The break-even win rate for any record is 1 divided by the average decimal odds: at average odds 2.50 you need 40% to stand still. Everything above break-even is edge; everything below is loss dressed in a percentage. Read win rate, average odds and yield together, over a stated number of bets — any record quoting win rate alone is hiding something.
Average odds 2.20 → break-even 45.5%. A record of 48% at those odds yields (0.48 × 2.20) − 1 = +5.6%. The same 48% at average odds 2.00 loses 4% of turnover.