Smart Contract

A smart contract is a program stored on a blockchain that executes instructions when certain conditions are satisfied. Instead of relying on a person, company, or platform operator to enforce an agreement, the rules are written in code and processed by the network. Once deployed, a smart contract is typically transparent and difficult to change, which can make its behavior easier to verify but also means bugs can be costly.

Smart contracts matter because they let blockchain applications handle actions such as sending tokens, swapping assets, issuing digital collectibles, managing loans, or recording votes without a traditional middleman. For example, a simple smart contract could release payment to a freelancer once a client confirms delivery, similar to an escrow service, but with the release rules executed by blockchain code. They are powerful building blocks, but users still need to understand the terms, risks, and permissions before interacting with them.