Adding a Discussion Board app on SharePoint is a very straightforward process. You simply choose the Discussion Board app from the Apps You Can Add page.
You can add as many discussion boards to your site as you like. You might find it beneficial to create a discussion board for each functional area to keep the discussions on topic. On the other hand, you might find that it is better to just have a single discussion board for the team and to get people using it and interacting with their ideas.
As with most things in SharePoint, the way you work with the functionality is up to you. SharePoint just provides the platform, and it’s up to you and your SharePoint consultant to determine the best way to use it.
To create a new Discussion Board app, follow these steps:
Click the Settings gear icon and choose Add an App.
The Your Apps page appears.
Scroll down and click the Discussion Board App button.
Type a name for the discussion board in the Name text box.
Click the Create button.
The new discussion board is added to your site and is accessible in the Quick Launch navigation on the left side. Congratulations! You’re ready to start a discussion.