Hi @Luara,

The "Summarize Discussion" feature is only available to teachers.

As long as it has not been "locked" by your Canvas admin, you have the ability to disable it for teachers by:

1. going into the course
2. clicking on "Settings"
3. clicking on "Feature Options" 
4. finding "Discussion Summary"
5. turning it off

The process is described in the  How do I manage feature options for a course? - Instructure Community - 710  support article.

More information about the functionality is available at  Discussion Summaries (Feature Preview) - Instructure Community .

-Doug