Definition
A cryptographic key derived from the private key that can be safely shared publicly. Your wallet address is derived from your public key. Others use your public key/address to send you funds.
Why It Matters
Understanding the difference between public and private keys is foundational to crypto security. Your public key is safe to share — your private key is never shared.
Example
Your Ethereum wallet address (0x...) is derived from your public key. Anyone can send ETH to it. Only you can spend from it, because only you have the private key.
Related Terms
Private Key
Address
Cryptography
Wallet