Groups are like a smaller version of your course and are used as a collaborative tool where students can work together on group projects and assignments.
As an instructor, use groups to:
Set up student group configurations at the course level for assignments and in-class work, both graded and ungraded.
Facilitate semester-long projects so that students can communicate and iterate on documents together.
Facilitate faculty professional development and institutional committees or activities.
Facilitate student-run study groups within courses or at the account level.
For more information about Groups, visit https://community.canvaslms.com/docs/DOC-4131#jive_content_id_Groups
Sections in Canvas are used to segment the class list for administrative purposes, typically based on teaching fellow assignment or meeting time.
Once you create sections, you can:
have varied due dates for assignments by section
filter the Gradebook by section
filter the SpeedGrader™ by section when grading student work
view section assignments for students on the People page
In addition to the official sections fed by the Registrar's office in my.Harvard, you can create and edit sections using the Manage Sections Tool.