If you need to host a forum of one or more topics, a forum extension to your website will allow interaction with visitors as guests or as registered members. Registration may require email confirmation, or perhaps even forum moderator authentication.
Configuration options allow extensive flexibility. Forum topics may be created by guests or by moderators, and forum responses may also be moderated. Email notifications can be used if desired. A forum is fully integrated into your site and may allow visitor registrations to interact with other site extensions, such as newsletters, event registration, and community features.
If you want your visitors to interact with your business or activities, then perhaps a forum is a venue to provide topics to glean their input.