What is ES6/ES7?

ES6 (ECMAScript 2015) and ES7 (ECMAScript 2016) are versions of the ECMAScript standard, which JavaScript is based on. ES6 introduced significant new features like arrow functions, classes, modules, `let` and `const` for variable declarations, template literals, destructuring, default parameters, spread/rest operators, and enhanced object literals. ES7 introduced features like `Array.prototype.includes()` and the exponentiation operator (**). They are commonly used to write more concise, readable, and maintainable JavaScript code in web development and server-side JavaScript environments like Node.js. ES6/ES7 are implemented in modern web browsers and transpiled for compatibility with older browsers.