A wallet address is a "public key" which is a unique way to identify a wallet. It corresponds to the address people will use to send cryptocurrency or NFTs to you.
Your NFTs and cryptocurrency do not live in your wallet but they exist on the blockchain, under your wallet address. Your software or hardware wallet only contains the key to that address.
⚠️ You also have a private key that you MUST NOT communicate. A range of numbers that represents your signature to authorize transactions on the blockchain. You must use a seed phrase to access to it.