Web services are used for application integration crisis.
using web services one can integrating applications at a very lower price point than any other integration technology.
It’s a new kind of middleware based on XML and the Web. XML and the Web help solve the challenges associated with traditional application-to-application integration like heterogeneity. They are platform and language independent.
Its advantages are :
As we can integrate our application to another application it ultimately increase our business
Make connection between Different Applications
Support for Loosely Coupled Applications
Web Services are Self Describing using WSDL
Automatic Discovery using UDDI