An Enterprise Service Bus also known as an ESB is a term that is used to define a shared messaging layer sitting in between different applications and various other services within the specific Enterprise computing network. ESB is the significant component of the Service Oriented Architecture (SOA) and focuses on integration of messages, Services and Software objects.
Fuse is software that basically lies between the different business applications and assists them to interconnect between each other with an ‘Enterprise Messaging Model’ which particularly defines a fixed set of standard message types that the ESB can send, transmit and receive.

Given below are few advantages of an enterprise service bus:
1. It tends to improve flexibility over the adaption of SOI or service oriented interfaces
2. Utilize a broad range of interaction models to meet your requirements
3. Take advantage of a comprehensive clients package to extend your environment
4. It gains support for a wide range of messaging protocols like JMS 1.1 to exploit various transports and interoperate.
5. Reduce sharing by utilizing ESB to handle complicated integration logic
6. Leverage advanced Web service support to incorporate leading edge capabilities
7. Protocol conversation between different protocols like IIOP, JMS, HTTP
8. Allow the flow of business events and add needed intelligence to that flow
9. Customized routing -Transport/protocol precise routing & content based routing
10. Leverage adapters to capture and dissemination of professional events