Showing tags by tag groups is very important for our forum where we have over 200 tags (e.g. “countries”, “fields”, “criteria” etc.).
Currently we have a huge alpha-sorted list mixing countries and other tags. So, I have to keep a separate topic in the Feedback category like “List of all tags you can use” (by groups), but keeping this topic in sync with the /tags page is a chore.
The proposed cosmetic change on a /tags page can significantly improve both UX and maintenance.
Please, consider adding this feature. 
