Your course’s gradebook will display all of the students enrolled in your course, as well as their grades for all of the assignments that you have created. It also allows you to edit their scores and view their final grade in your class.
In order to input grades for each student, you have to create assignments in the “Assignments” section of a particular Canvas course. These can be actual assignments that a student has to complete online or simple placeholders that virtually represent the grades that a student received in a face-to-face class. Here’s a video showing you how to create grade book entries in Canvas and assign grades to a student: