Exact strings are the clipboard's home turf
A wallet address, an IBAN, a license key: these are things you must copy, not type. One wrong character and a payment goes nowhere, or somewhere it should not. AutoFill will not help, because none of them are form fields it recognises.
Copy the exact string once and it is in your history, ready to paste perfectly, as many times as you need. And because it syncs, you can copy a receiving address on your phone and paste it into an exchange on your Mac without retyping a thing.
Receiving addresses are public and safe to save. Never put a seed phrase or private key in a clipboard, though. Keep those in a hardware wallet.
