Faculty can use SpeedGrader to review student assignments (e.g., a Word doc), provide written and/or video feedback, assign a grade, and then move to the next student in one smooth workflow. Instead of having to download all assignments to a local machine and then dig around for individual student submissions, SpeedGrader allows instructors to work entirely in the browser, moving quickly and easily from student-to-student during the grading process.
More information about SpeedGrader can be found at the Canvas Instructor Guide.