Array Joining is a programming technique used to combine elements of an array into a single string. This is often done using a specific method or function that takes the elements of the array and concatenates them, typically with a specified separator, such as a comma or space. For example, in JavaScript, the `join()` method can be used to achieve this. If you have an array of words, using `join(", ")` would create a string where each word is separated by a comma and a space, making the output more readable and organized.