Following are the few points that justify why Enterprise Service Bus is important:
ESB plans to adjust the matter of combination with various compatible applications.
It goes about as a Middleware, that is a moderator of the majority of your applications and encourages message steering between them.
Instead of every application interfacing with every other alternative application directly, it simply has an individual interface to the ESB.
The ESB is known for making an interpretation of messages to/from a standard arrangement and directing them to their goals.
The significant sparing amid this methodology comes as a shelter in the event that you must trade any of your current applications. As opposed to composing a full cluster of late interfaces, you right now exclusively have only one interface, i.e, between your application and in this manner the ESB.