This plugin makes it easy and fast to add a marker (badge) to a topic, by placing a button next to the «Reply to this topic»-button. The marker visually stands out, both when viewing the topic and when viewing the forums.
It's similar to using tags, but with tags you and your members will have to edit the topic and manually add the tag. Also, unless I’m mistaken, there is no way to restrict a tag to specific forums or members. This plugin is kind of a combination of tags, prefixes, and saved actions (multimoderation), and you can allow everyone to use the markers, not only admins and moderators.
Here are a few pictures showing the visual differences between markers, tags, and prefixes.
When viewing the forum:
When viewing the topics:
Let me know if you have any other questions!