ESLint is a popular JavaScript linter that helps enforce coding standards and best practices in your Node.js projects. It identifies and reports syntax errors, potential bugs, and style inconsistencies in your codebase. ESLint supports a wide range of configurable rules and provides flexibility to customize linting rules based on your project's requirements. By integrating ESLint into your development process, you can catch errors early, ensure code consistency, and improve the overall quality of your Node.js applications.