What will the `push()` method do in JavaScript?

The push() method in JavaScript is used to add one or more elements to the end of an array. This allows developers to dynamically increase the size of an array and include new items as needed. When push() is called, it modifies the original array by placing the specified elements at the end, and it returns the new length of the array after the addition.

For instance, if you have an array defined as let myArray = [1, 2, 3]; and you use myArray.push(4);, the array will then become [1, 2, 3, 4], and the method will return 4, reflecting the new length of the array. This functionality makes push() a fundamental method for managing array contents in many JavaScript applications.