Getting Started with Piazza
Piazza is a different type of forum where any student in a class can ask a question, or contribute a response to a question that has been posted by someone else. Instructors and TAs are able to moderate items posted in Piazza, and may choose to answer a question themselves or endorse or correct a response that a student has posted.
Piazza can be used independently of Canvas; however, adding a link to Piazza in your Canvas course will allow you and your students to go directly into Piazza without an additional sign-in. See these instructions for linking Piazza to your Canvas course.