This alpha release of Hedera Services 0.23 includes the initial implementation of HIP-336 (Approval and Allowance API for Tokens).
Account owners can now grant other accounts the permission to manage some portion of their ℏ, fungible token, or NFT assets. This can simplify interactions with a trusted NFT marketplace or merchant, allowing the trusted party to transact on an owner's account without direct access to the account's key, or direct involvement of the owner.