Whenever there's a forum for a website, it's generally because the website owner wants to have a community, or at least have a place for people to post if needed to be. However, whenever you own a forum, you sometimes make a website for it. That website could list all the staff, statistics, etc in one webpage and make things more convenient and professional.
Depending on which you own, do you have a forum for your website? or website for your forum?
For my personal website, I have a forum that I use mainly for support queries.
When I still had a forum, I once tried to add a website to it, in form of blog. I thought it was cool if I could display the latest news and updates before they clicked on the forum. But then it was too much work, both to install it and to handle it, and I prefer forum all the way, so I took it down. Since then I never added any website to the forum, not even a portal. Better to let guests see straight to the forum, in my opinion.