I need help with the chat room ordeal

When I get on to chat room and I tap a name on the top right corner and tap pm or something. It then says identify yourself and Nick. What does that mean? I need help getting through that. Please help

nick stands for nickname

It’s probably the IRC servers nickserv bots. Basically, don’t worry about it.

Nick is your friend that’s always stalking you, you didn’t notice him but the system did, identify yourselves