It states:
An Ethereum address is a 64 character hex string generated subject to various rules defined in the Ethereum yellow paper. It represents a unique account on the Ethereum network and has an associated private key. This private key is requried to prove ownership of the address and has to be kept safe.
I suggest:
An Ethereum address is a 42 character string: "0x" followed by 40 hex digits generated subject to various rules defined in the Ethereum yellow paper. It represents a unique account on the Ethereum network and has an associated private key. This private key is required to prove ownership of the address and has to be kept safe.