The back end infrastructure of tags has been updated to fix some bugs in the way popular and related tags were counted. We also added the tags under the topic titles on the topic listings to help give context to the topic titles and give users a better idea of what the topic is about (see an example topic listing below).
One of the things fixed in this update is that only the top 5 topic tags are counted toward the popular tags list, the related tags list, or the tag pages that a topic could appear on. Prior to this update anyone who tagged a topic would make that topic appear on the tag page, so if just one person tagged a trivia topic “politics” it would show up for everyone when they visit the politics tag. This had a lot of potential to make the categorization of the topics prone to abuse and the updates were a big step toward making the useful tags more prominent and the tagging feature more useful.