In the strictest technical sense, a cheque is an instruction from you to your bank, to pay a quantity of money out of your account to someone you have named.
Once you have issued a cheque to your creditor, he can if he wishes collect this money by submitting the cheque before a teller at an office of your bank. Your account will be debited for the amount concerned, and he will receive the money.
But most of the time, he will deposit it in his own account and let his bank make the necessary arrangements with your bank. Your account will be debited, and his account will be credited, for the amount concerned.