These are earned from doing daily quests in Pandaria. You can turn these in to Elder Lin for Alliance or Elder Liao for Horde which are located in the Shrine of Two Moons and Shrine of Seven Stars respectively. You can only turn these in to the elders once per week and it has to be in a stack of 90. Upon completion of the quest to turn them in you will receive 3 Elder Charms of Good Fortune.
Find out more about Elder Charms of Good Fortune by clicking the link here: http://www.wowdb.com/currencies/697-elder-charm-of-good-fortune