An Extended Public Key (xPub) is a key associated with a cryptocurrency wallet that allows for the generation of multiple public keys from a single starting point. It is part of a hierarchical deterministic wallet structure, which means that a master key can create numerous child keys following a specific branching system.The main advantage of using an xPub is that it enables users to generate new wallet addresses for receiving funds without needing to expose their private keys. This enhances privacy and security, as each transaction can originate from a different address linked to the same wallet, making it harder to track funds.Additionally, xPubs are useful for users who want to monitor their wallet’s balance and transactions without needing access to the private keys. They can share the xPub with services that require the ability to check balances and transaction history without compromising the security of their funds.