Additionally...
2. Many players have found that the Move To function either only works for short distances between them and the target, or stops working if large terrain features are in the way. It's generally better to use the Follow function (it's in the same context menu as the Move To function). Doing that will put an arrow on your character, pointing the general way towards the NPC for the quest, and regardless of distance or terrain features. It will stay there until you reach the NPC.