The chat feature in your UD Google Workspace account allows you to send and receive instant messages with people at UD, as well as anyone outside of UD, who also uses Google Chat.
Google Workspace Learning Center (Chat)
Accessing Chat
Getting Started with Google Chat
Switching to Chat from Classic Hangouts
Google Chat Cheat Sheet
Locate Chat within your UD Gmail Inbox (it's on the left side or right side of the Inbox). Click on the expand arrow to expand the Chat section.