What is ECMAScript6?

ECMAScript 6 (ES6), also known as ECMAScript 2015, is a major update to the JavaScript language standard. It introduces significant new features and syntax improvements, such as arrow functions, classes, modules, `let` and `const` for variable declarations, template literals, destructuring, default parameters, spread/rest operators, and enhanced object literals. ES6 greatly improves code readability, maintainability, and overall development efficiency in JavaScript, and is widely supported by modern browsers and JavaScript environments.