part of the WSRP implementation is an application that enables a server to consume portlets that WSRP Producers provide as WSRP services. The WSRP Consumer works as the "client" of the WSRP communication.
A WSRP Consumer integrates a provided portlet as a remote portlet. The Consumer requests and receives the markup from the remote WSRP service at the Producer and presents it to its users. This way, the Consumer can consume one or more WSRP services as remote portlets.
Parent topic: How WSRP works