You have been invited to example.com
Register an account on example.com
You need to install an XMPP client to access the XMPP network.
Here are the most commonly used clients for Linux:
See the full list of XMPP clients for other platforms and devices.
XMPP is a provider independent form of instant messaging. You can pick from many different clients and have a free choice of server operators to participate.
example.com: