What is the Role of a Priest in Groups?

he most common sought after use of Priests is for their healing abilities, therefore, if you are a Priest you will commonly get invited to groups to fulfill the role of a healer. Although a shadow spec'd Priest is able to heal fine for lower levels or in easier instances, Holy spec'd Priests are often desired for end game raids and instances. However, shadow spec'd Priests are also extremely beneficial in group settings because of their consistent damage, their ability to backup heal and resurrect players, and the bonus healing and mana regen their shadow spells can provide.