The Tag Groups Info feature is part of the Tag Groups plugin and is available as a shortcode.
You can use a shortcode to display information about your tag groups. This usually comprises the group names and the post count (the number of posts that have tags in this group).
[tag_groups_info]
The output will look like this screenshot below:
It is also possible to display only the name or the post count of one group. For more details see the list of parameters.