Is there a UX site with active threaded forum discussions? [closed]

1. What is discussion forum sites?
2. Which of the following examples is an appropriate use of discussion forum?
3. What is discussion forum in social media?

What is discussion forum sites?

An environment where participants can pose issues for discussion and respond to any contribution, thus creating threaded discussions that can spawn a discussion tree where the discussion branches out in many directions or subthreads.

Which of the following examples is an appropriate use of discussion forum?

An online forum is an appropriate example of use of the discussion forum. An online forum is an online platform where users post messages to hold a discussion around a given topic.

What is discussion forum in social media?

Discussion forums are the longest established form of social media, typically built around specific topics and interests. Each separate discussion in a forum is known as a thread, and typically many different threads are active simultaneously.