Having the best answer marked improves the user experience for users who are looking for an answer, since the marked answer will show on top of the list of answers.
Motivating users who asked a question to mark answers seems challenging. Most of them did not mark it, which lead to many questions not having a marked answer or the moderator had to step in and mark the answer.
Now “Super-User” is a primary role, we were able to provide them with the right to mark best answers. We are confident this will results in more questions have a marked answer.
This feature will be available for all branded templates from Friday August 10 onwards.
You will not be able to disable this feature. If you don't want your super-users to be able to mark answers, we suggest to not use the 'Superuser' primary role but use custom roles