Cash Out is a feature that gives you the opportunity to close out your active bet before the outcome is decided. This allows you to secure part of your winnings or cut your losses as the odds change in or against your favor.
While the debit from your 1xBet account is almost instant, your banking service might take 5-7 business days to process the request. That'd differ from bank to bank. The same goes for many online wallets like PayPal, Wise, Paysafecard, etc. The total time for the cash to be credited is subject to the withdrawal method.