This addon simply shows an area (blob) and a spot indicator just like the Wow built-in QuestWatcher on the Worldmap, but now on the Zone Map, a.k.a. BattlefieldMinimap (default keybind Shift+M).
When you enter a different zone ( major or subzone ) it will look for the nearest quest in your questlog and show that area and/or spot.
When you click a quest in the questlog it will show the area and/or spot for that quest. When you click a spot indicator on the Worldmap it will also be shown on the Zone Map. If you click on one of the quest buttons of the quests being watched (right side of screen) it will be shown on the Zone Map.