The technology used to build decentralized applications on blockchains is known as smart contracts. Smart contracts are self-executing agreements with the terms directly written into code, running on the blockchain. They facilitate trustless transactions by automating processes and removing intermediaries. These contracts ensure that conditions are met before executing actions, enhancing security and transparency. They underpin a variety of decentralized applications (dApps), spanning sectors like finance, supply chain, and gaming. This technology fosters innovation and efficiency, empowering users through direct control and reduced reliance on centralized authorities.