A crypto address refers to a string of alphanumeric characters representing a wallet to facilitate the sending and receiving of cryptocurrencies. Users are provided with a private and public key when they open a wallet. 

An address is essentially a transitory, hashed version of a public key. Crypto addresses are often rendered in a QR code format for easy sharing.

Crypto addresses come in a variety of formats such as:

• Pay-to-PubKey-Hash (P2PKH) which is also known as Legacy address
• Pay to script hash (P2SH)
• Bech32

It is important to note that not all crypto address formats are supported by the various wallets available in the market. Users should DYOR and take necessary precautions to ensure their safety and security.