The "CashOut" option allows you to settle your bet even before the final result is known. The amount you will receive will depend on the current situation of the event and also on the odd changes in the game you selected.
The "CashOut" option is only available for your unsettled bets and may be available for both pre-match and live bets. If you have placed multiple bets (single bet and parlay bet or multiple single bets and parlay bets), the "CashOut" option will be available separately for each of these bets.
Furthermore, this option is only available for the entire Parlay, not its separate events. Please keep in mind, however, that CashOut will not always be available.