Let's begin with Sets. In JavaScript, a Set is a unique type of object that stores various data types, either primitive or objects. A Set does not contain duplicates. Think of a Set as a cosmic bag holding celestial bodies (elements), ensuring that each remains one-of-a-kind.

The array includes duplicates. The set, in contrast, displays only unique values.

The creation of a Set involves the new keyword and the Set() method. You can add items using the .add() method.

In this case, 'Star' was added twice, but the Set retains it as a single entry to prevent duplication.

To remove entries from a Set, use the .delete() method. If you want to clear a Set entirely, use the method.