To create a Forum, you should first install and activate bbPress:
Once the plugin has been activated, you will see new options for Forums, Topics and Replies available in your Dashboard:
Navigate to Forums > New Forum. Here you can give a name to your Forum and define its type, status and visibility:
Once you’ve created your Forum, you can create and add Topics to it:
Once you’ve added the Topics to your Forum, they will be listed when you visit the forum:
Users also have the option to create new topics for each public forum. In each topic, you will see all its replies, and you can add your own as well:
All replies are recorded in Dashboard > Replies:
Each reply records the topic and forum it refers to, and it can also be changed, marked as spam and deleted.