Repository:

https://github.com/discourse/discourse-tag-icons

Installation instructions: https://meta.discourse.org/t/how-do-i-install-a-theme-or-theme-component/63682

What this does?

This component allows tags to have an icon next to the tag label. Here is an example of how this would look, with tag style set to the default (simple):

image: 690x79

Here is how this looks with tag style set to box:

image: 690x61

Configuration

Configuration is pretty straightforward:

image: 690x329

See also the Category Icons component, which does the same thing for categories.