There are some information and icons on the top of your screens. From left to right here is the description of each.



Information/Icon
Description
Class Name
Name of the Class Entered
Student ToolsCurrent materials that navigated and be used by Students for learning 
ChatChats that can be used in Class like 'Everyone' which would be a class chat
PeopleList of Instructors and Students in Class
Raise handVirtually raising hand in class
ReactionsShare your reaction to something in class with the whole class or just with the Instructor and/or Presenter
ViewHow to view other peoples cameras if available
... MoreTurn on closed captioning or giving feedback to class
CameraTurn on/off camera; pick camera
MicTurn on/off microphone; pick microphone
LeaveLeave Class





For more information here: https://support.class.com/s/article/Navigate-the-Class-for-Teams-Room?language=en_US