A wallet address is an entity that can send transactions and hold balances. It can be thought of as analogous to an email address. Email addresses are public. Anyone can send emails to an email address. However, only the password holder can access those emails and send emails from that email address. Similarly, wallet addresses are public. Anyone can send crypto assets to an email address. However, only the private key holder can across those funds and transfer funds from that address.
Wallet addresses take the form of 16 randomized alphanumeric characters. For example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045.