A token is a digital asset issued on a blockchain. Some tokens are fungible (one is identical to another, like USDC or ETH); some are non-fungible (NFTs). When hashtag.org accepts crypto checkout, it is accepting a fungible token (USDC) into the receiving wallet.
Web3 & crypto basics
Token
A unit of value on a blockchain (e.g. USDC, ETH, SOL).