Solidity is a high-level programming language designed specifically for creating smart contracts that can run on the Ethereum blockchain. Smart contracts are self-executing programs that facilitate, verify, and enforce the terms of an agreement between parties without the need for intermediaries. Solidity is a popular language for building decentralized applications (DApps) on the Ethereum network, as it allows developers to write efficient and secure smart contracts that can interact with other smart contracts and the blockchain itself. Solidity has a syntax similar to that of JavaScript, and it supports features like inheritance, libraries, and complex user-defined types. It also includes built-in security features to help prevent common programming errors and vulnerabilities that could be exploited by attackers. Solidity code is compiled into bytecode, which is then executed by the Ethereum Virtual Machine (EVM).