Cash Out gives you the chance to secure winnings or limit your losses during a live event, on which you have placed a wager. The cashed out amount will be credited to your account, as shown when you requested to cash out your bet.
However, due to German regulations, your winnings will only be credited, once the event you have placed your wager on is over.
As an example: You have placed a 10€ single bet on Bayern Munich winning their match against Real Madrid, and they are leading 1:0. In the 60th minute, you request a cash out for 16€.
That amount will be credited, once the match has concluded, without any changes to your winnings, no matter how the game ultimately finishes.
In case of accumulator bets, the payout will be performed, once the last bet on your bestlip has been settled.