An address is like your id within the blockchain. It identifies whether or not the address is linked to a wallet address, good contract, or transaction hash. There are actually 2 different types of addresses: Externally Owned Addresses (basically your wallet address) and Deal Addresses. Confirm the signature request inside https://eth-vanity-address-genera31841.buyoutblog.com/27959693/top-vanity-eth-address-secrets