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Summary
Google Chat is a chat room tool that helps groups of people coordinate their communication. Google Chat is available at chat.google.com. Rooms can be created for specific purposes with specific people to facilitate communication. Google Meet can be launched from these rooms to invite the individuals in the room.
Details
To create a Google Chat room, click on "Find people, rooms, bots". The "Create Room" option becomes available in the drop down menu. The room then needs to be named. Common naming schemes would be the class title or team name. New members can be added by searching by their name. Chat rooms can host up to 25 members at a time.
The list of Rooms available to you is shown in the left column.
To chat within the room, a new thread needs to be created. Threads are useful for separating conversations within the chat room.. Google Hangouts is Google's instant messaging tool. You can message one person or multiple people with this tool. The differences between Google Chat and Google Hangouts are further clarified by Google.
Google Meet, or Google Hangouts Meet, is Google's teleconferencing solution similar to Facetime or Skype. Google Meet is hosted in a meeting room. Meetings can be stared via Google Chat, Google Calendar, or by going to meet.google.com.
Google Chat and Google Meet can be opened by selecting the 9 dots in the top right corner of your Gmail and selecting the desired application.