Gasback is a term used in the context of cryptocurrency and blockchain technology. It refers to a reward system where users receive a percentage of their transaction fees back after making a purchase or trade. This incentivizes users to engage more with the platform, as they can earn back a portion of what they spend. The Gasback system is often associated with decentralized finance (DeFi) platforms and can enhance user experience by reducing overall costs. It is similar to cashback programs in traditional finance, where consumers receive money back after making purchases, but it operates within the digital currency ecosystem.