JavaScript arrays are used to store and manipulate lists of data. They can hold any type of value, including numbers, strings, objects, and even other arrays. Arrays are created using square brackets and can be accessed by their index number, starting at 0 for the first element. JavaScript arrays have many built-in methods, such as push(), pop(), shift(), and unshift(), which allow for easy modification of the array's contents. They also have properties like length, which returns the number of elements in the array. Arrays are a fundamental data structure in JavaScript and are widely used in programming. Connect at the website to know more about the JavaScript Arrays.