Quest Log

The Quest Log can be accessed from your character sheet/inventory page (it's the third tab at the top of the screen), or directly from the world map/dungeon by tapping the compass in the top right corner of the screen. The quest log keeps track of all the quests you've taken in your career. By default it only shows active quests, but you can switch to wieving completed quests too. On the left side is a list of quests. Tapping any quest will bring up a screen on the right side with a short description, the quest's objective (also showing your progress) and the rewards for completing it. Some quests can be completed more than once (the ones where you need to gather a certain amount of generic items), and you get the rewards every time you complete it.

There is also a compass in the top right corner of each quest's description, tap it to start tracking that quest (a small symbol will appear next to the quest in the quest list to the left, to show that it's being tracked). This makes the compass on the world map or dungeon point in the direction of the location where you need to go in order to complete the quest. If the compass doesnt point in any direction, it means that the enemies/quest items for that quest appear in battles at random, so the compass cant tell you exactly where to go. Just enter battles until you get what you need.