You can only host a forum through a WorldLabs page that has been upgraded to a community.
Once you have set up a WorldLabs community, your forum will automatically unlock. To get started, click “Forum” in the fixed menu that appears down the left-hand-side of your community, then click “Start a discussion”.
Once you have clicked “Start a discussion”, you can then specify a title for your post, include your text, and apply one or more tags that will help forum participants to understand what your post is about.
Next, click “Post Discussion”, which will generate a post in the forum.