Create Reports on Topics and the Posts That Use Them
You can now report on posts and comments with a particular topic and see the post and comment content and other details. Create a custom report type with topic assignments as the primary object, and feed posts as the secondary object. You can also include feed comments as a third object. Previously, you could create reports that gathered the records, including posts, that included a particular topic. However, you couldn’t view the content of the posts.
Where: This change applies to Lightning Experience and Salesforce Classic (not available in all orgs) in Contact Manager, Group, Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.