The ethereum address is the address for your wallet. It’s a string of characters that you associate with your account in order to transact with the blockchain.
With the site you can create a your own ethereum address.
The address of a ethereum account is an alphanumeric string that starts with zero, followed by a sequence of characters. The address can be used to access the funds in the account, and it is how you prove ownership of the account.
The first character after the zero is always a lower case letter. Subsequent characters are uppercase letters and numbers.
For example: 0x10102121abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345678