Topic types are a taxonomy set that can be used to categorise the topics.
A topic has a certain content structure. When making use of different topic types, you are able to categorise this content.
This makes it easier to search for certain content in the overview, or on peoples profile.
The default topic types in Open Social are:
You could even create a separate menu link that links to just 1 topic type. Clicking on the link will show users a page that contain only content of the type ' Blog'.
Topic types can be powerfull to create a structure in the content.
You are able to create new types and delete the default ones.
Some other examples could be; document, resource, support, ideas, materials.