ES6 (ECMAScript 2015) is a major update to the JavaScript language specification, and it introduced many new features and improvements to the language. Here are some of the key features introduced in ES6: let and const: New ways to declare variables with block scope. 1) Arrow functions: A new syntax for defining functions with shorter syntax, implicit returns, and lexical this. 2) Template literals: A new syntax for creating string literals with interpolation and multiline support. 3) Destructuring assignment: A new syntax for extracting values from objects and arrays into variables. 4) Rest and spread operators: New syntax for working with function arguments and arrays. 5) Default function parameters: A new way to define default values for function parameters. 6) Classes: A new syntax for defining classes, which provide a more concise and familiar syntax for creating objects and inheritance. 7) Modules: A new syntax for defining modules, which provide a better way to organize and reuse code. 8) Promises: A new way to work with asynchronous code that simplifies error handling and chaining of operations. 9) Symbol type: A new primitive type that provides a way to create unique values. 10) Iterators and generators: New ways to work with collections of data, including custom iteration behavior. These are just some of the many new features introduced in ES6, and they have significantly improved the capabilities and expressiveness of the JavaScript language. Please check this link for all the ES6 features in detail