• 1. It is a keyword.
• 2. It is a variable, which holds the reference.
• 3. In GEC it holds the address of window object.
• 4. It is a local variable of every function in js, and holds the address of window object. Except in Arrow function (for arrow function it stores undefined).
• 5. Inside object methods, 'this' holds the reference of current object (not in arrow function).