The functions of a BTC address are meant to accommodate the trade/exchange of Bitcoin. A BTC address represents the destination of the trade/exchange. The address is a sequence of letters and numbers represented on the BTC network.
BTC addresses are used when receiving BTC. This address is only meant to be used once, as it is unique to that specific transaction. For every transaction initiated, a unique address is created.
For a BTC transaction to be initiated, the recipient will generate a single-use BTC address using their crypto wallet. The sender will enter the recipient's unique address into their respective crypto wallet and send the required amount.
BTC CANNOT be returned to the sender via the same BTC address used. BTC trades/exchanges do not include a return address. This is an intentional feature of BTC to ensure privacy protection by removing the ability to connect transactions. Every BTC transaction is a stand-alone transaction, with only one unique address identifying it.
It is important to note that BTC transactions cannot be reversed. Therefore, it is imperative one proofreads the address entered to ensure accuracy. Remember, there is a unique, single-use address for EVERY BTC transaction; even with repeat recipients.