Private key and Public key
The address is a unique identifier for the Ether storage.
Creating an address is generating a private key. From the private key, you can get the public key. In fact, the address is the hash of public key. Private key cannot be changed or regenerated.
You can see the private keys of your addresses. To do this, enable the corresponding switch in the settings.
ATTENTION !!! Do not give private keys to anyone! Knowing them, the attacker will be able to create transactions and accordingly manage your funds!