The starting locations of quests are identified by a blue star within the miniature map. Furthermore, players can get the basic information about quest locations and how to complete them within the Quest Journal which is implemented into the interface. The completion of a quest, apart from the rewards mentioned previously, generally grants players quest points, experience with certain skills , and sometimes even things. At present, there are about 150 quests in Old School RuneScape but only 20 of them are available to players who are adventurers.
In opening Quest Journal, in the game, you'll be able to gain access to the list of missions both available and ones that have already been completed. It's a simple way of tracking which of them you have to finish. When you select one it will open a window with details of how you can complete a next step that may help you complete the task.
In reading through Journal and looking through the journal, you'll see that there are several levels of quests : Novice, Intermediate, Experienced, Master and Grandmaster. Quests like Cook's Assistant, Rune Mysteries, Ernest the Chicken, Dwarf Cannon, Vampire Slayer, Restless Ghost or Recruitment Drive are classified as Novice since they don't meet any prerequisites for their completion.