Public keys are not addresses. Bitcoin address is what you will give people that would be used to send your coins. They start from 1, 3 or bc1.
Public key is different. They start from 04, 02 and 03. Gone are the days people send coins to public key, addresses are used this now.
To send Bitcoin, you must have access to the public and private keys associated with the amount of bitcoin you want to send. When we talk of someone "owning" bitcoins, what it actually means is that person has access to a 'key pair' comprised of:
If you have access to the private key, you have access to the public key and address. Private key is what that is mostly important.