From e-Learning Documentation
The Feedback tool is useful for providing any type of information to individual students by importing the information from a .csv file into eLearning in Sakai. While you can provide feedback using the Gradebook, Gradebook 2, Assignments, Assessments and Tests & Quizzes, the feedback tool provides other opportunities to distribute information. One example might be to display weekly progress comments to students. One instructor reports that it is an effective way to share a grading rubric with the students.