@babel/eslint-parser allows ESLint to lint all valid Babel code. It bridges the gap between ESLint, which uses ESTree, and Babel, which understands modern JavaScript syntax features. This parser enables linting for the latest ECMAScript proposals and syntax extensions like JSX, Flow, and TypeScript. By using @babel/eslint-parser, developers can ensure their code, utilizing modern JavaScript features, adheres to consistent style guidelines and best practices enforced by ESLint.