The JavaScript Spread Operator is a powerful feature that allows developers to expand an iterable, such as an array or string, into individual elements. This is done by using three dots (...) before the iterable. The Spread Operator can be used in various ways, including copying an array or object, concatenating arrays, and passing multiple arguments to a function. It is also useful in creating new arrays or objects by merging existing ones. The JavaScript Spread Operator simplifies coding and makes it more efficient, reducing the need for loops or other complex operations.