Hi Kshitij,
Please find the description of the modules Ariba Buyer, Ariba Discovery and Ariba Network
Ariba Buyer: This procurement application is used for procure to pay.
Ariba Discovery: The business matchmaking service that helps you find leads among thousands of large companies on the Ariba Network. This module is like a yellow pages where you can search different suppliers.
Ariba Network: Cloud-based B2B sourcing and procurement marketplace where buyers and suppliers can do business within a single networked structure.
Regards,
Nadeem Ahmed