

Once you reach level 15, you can run through the Satasha dungeon. If you complete as many quests as you can find and your daily allotment of guildleves, you will hit level 15 in no time. Quests and guildleves are the best source of experience points until you can start running through dungeons.

From level one to level 15, there are no dungeons you can play, so you must rely on quests and killing random enemies (mobs). You can still level via the FATE battles, but dungeons are an overall better experience because you generally earn more experience points, and you learn how to play your class.

However, as the game was patched things changed, and now it's better to level in the various dungeons on your way to 50. When Final Fantasy 14: A Realm Reborn first released, large group battles known as FATEs were the best way to level to 50.
