The Aptos (APT) token is a utility and governance token based on the Aptos token standard, which has several key qualities. First, the APT token is interoperable; it uses a standard implementation which improves interoperability and compatibility across the Aptos ecosystem.
It focuses on facilitating liquidity by defining fungible, semi-fungible and non-fungible tokens (NFTs) in a single, smart contract. This quality allows tokens to be easily stored, transferred and transacted and helps fulfil the first goal of overall interoperability throughout the Aptos ecosystem.
APT tokens also allow for rich on-chain properties which users can use to customise and define their own token properties, which can be easily stored on-chain. This could possibly eliminate the need for additional metadata stored off-chain.