If you’re using forums similarly to how Moodle.org does (where a course may have many different forums all for a different subject or purpose) keeping order within the forums can be important so that enrolled users aren’t getting automatically notified by new threads that are not relevant.
Moving threads from forum to forum in Moodle could not be easier. Just locate the thread as an editing teacher, click to view the thread and then use the drop down to select which forum you want to move the thread to.
Check out the documentation here: https://docs.moodle.org/28/en/Using_Forum#Moving_between_forum_threads
It’s that easy…check out the GIF demonstrating the process below.