You can read the conversations students had with a lesson's tutor while they were working.
Finding them
Open the classroom from the sidebar, go to Assignments, click the assignment and then the lesson.
Open a student's submission. Their conversation sits alongside their answers, so you can see what they were stuck on as well as what they wrote.
This is available in every organisation by default. If your organisation has private student chats switched on, transcripts are hidden unless the classroom is a research classroom and the student has consented.