Your agent is your own study companion. It knows the classes you are in and the work you have been set, so you can ask about your own subjects rather than starting from scratch every time.
Opening it
Click Agent in the sidebar.
What to ask it
"Help me understand where I am struggling."
"Review the concepts from my pathways."
"Explain this feedback my teacher left me."
"Create a visual to explain black holes."
The suggestions under the chat box are a good place to start if you are not sure what to ask.
Your agent is not your class tutor
A tutor is set up by your teacher for a particular topic, and often answers with questions rather than answers. Your agent is yours, across all your subjects.