Adding a topic to a post makes it more discoverable for others and allows for better organization in your knowledge base. Multiple topics can also be added to a post, improving the post's reach.
Topics also help control a published post's permissions.
How to add a topic to a post
If your post is in edit mode, click Add a topic... at the top of a post or enable the topic editor by:
Clicking on the ... menu in the top right corner of a post.
Click Edit topics.
Then search and click on the desired topic.
You can add multiple topics to a post. This applies additive access to the post. For example, if a post is added to two private topics, both members of the topic will be able to access it.
Removing topics from a post
To remove a topic from a post, enable the topic editor as explained here, then click the X icon next to a topic name.
Adding posts to topics using the Content Map
Click here to learn how admins can add posts to topics using the Content Map.