Turnitin ("turn it in") is an originality checker that integrates with Canvas. Turnitin can scan writing that you turn in to make sure your sources are correctly cited and aligned with NKU's Academic Honesty policy.
Turnitin operates within Canvas, so you shouldn't have to do anything different from submitting other written assignments. Depending on how your instructor setup the assignment, you will get access to an originality report for your submission.