Allows you to toggle your minimap. Helpful if you don't always need to see it and need more space in your UI. Simply use the command /tmm or /ToggleMiniMap to toggle your minimap.
If you're interested, I have also created an addon to toggle your quest tracker: https://mods.curse.com/addons/wow/toggle-quest-tracker and another one to sell your trash (gray) items automatically: https://mods.curse.com/addons/wow/selltrash