In Blockchain world, an address would typically be a hashed version of the "public key", which will be referred to by an individual or a platform, in order to transfer any cryptocurrency to a wallet. It is a combination of unique numbers and letters and works similar to an email address.

Its like a bank account for cryptocurrency asset. In a public blockchain, address can also be used to perform analytics on a wallet as it is sufficient to trace assets in the wallet. In Bitcoin world, different address formats are used.