When you Distribute a form to Users and/or Teams, there are different privilege levels that dictate what the User can View and Edit for a given form.
View Own Submission: Able to see your own form submissions.
View All Submissions: Able to see your own and all other users' form submissions.
Edit Own Submissions: Able to view all form submissions, and edit your own submissions.
Edit All Submissions: Able to view all form submissions, and edit all form submissions.