Why is keyword used a lot in JavaScript?

The this keyword in JavaScript designates an object. Depending on how this is invoked, which object will be used (used or called). Depending on how it is used, the this keyword can be used to refer to a variety of objects: This refers to the object in an object method.

The this keyword in JavaScript enables us to: Reuse functions in various execution contexts. It implies that a function can be called for various objects after it has been declared by utilising the this keyword.