The forum activity in Course Site allows participants in a course site to exchange ideas and have discussions.
There are 5 types of forums, each designed with a very specific educational purpose.
Here is an excerpt from the Moodle documentation for Forum Settings:
Special Purpose Forums
Here is a link to help determine the correct forum type to use in your course: https://docs.moodle.org/32/en/Forum_activity
You may also choose to use an OUBlog as it has some additional functionality not offered in the coursesite forums.
Note: Announcement forum is a special type of forum that is automatically created with a new course.
Here is a link to General information about Forums.
If you would like to discuss the use of Forums in your course site, please contact an Instructional Technologist.