Questions is an add-on for Confluence.

You need Confluence 6.0 or later to use Questions for Confluence.  See the Confluence Installation Guide for information on installing Confluence 6.0 or later. 

To install the Questions for Confluence add-on:

1. Go to  > Manage apps > Find apps.
2. Search for Questions for Confluence.
3. Choose Free Trial or Buy Now.

By default everyone in your confluence-users group will have permissions to use Questions. See Permissions if you wish to restrict access to particular groups.