$HOLO o is a platform that acts as a bridge between Holochain decentralized applications and the traditional web. Unlike blockchains, Holochain is a "agent-centric" distributed ledger technology that allows applications (called hApps) to scale more efficiently and without the typical transaction costs.
The HOT token traded on exchanges is a "promissory note" or IOU. Its value is based on the promise that once the Holochain mainnet is fully operational, it can be redeemed 1:1 for HoloFuel, the true utility token of the network.
The utility of HoloFuel is to reward "hosts" who provide their computing resources (such as storage space and processing power) to host Holochain applications. Essentially, Holo aims to create an "Airbnb" economy for decentralized applications.