Cleric is a healer, while it can be decent ranged dps he is best in keeping teammates alive and support them with various buffs.
Main Ability Scores of this class Wisdom, Strength, Charisma and tactic skill is dodge.
Cleric's class mechanic is based on divine power collected with every hit and heal, when divine power is loaded you can use Channel Divinity to strengthen your Encounter skills and change your at-wills to Punishing Light (using divine power, high damage skill) and Soothing Light (using divine power, high healing ability). Each use of Encounter power will consume one of maximum 3 Divine Symbol (cross symbol on the left of divine power).
Best races for Cleric are Half-Elf and Dwarf due to matched AS.
Effect of Ability Score on stat per point over 10:
Neverwinter Devoted Cleric is a very cool class, can bring Healing, Damage, DPS Buff and Target Debuff in a party. DC class also is a leader and controller, but not the exclusive healer. The strength of a DC in a party lies in the buffering. Without a DC you might find that you lack the strength to kill a boss effeciently.
Last, below is the list of commonly applied debuffs on targets that your party can benefit from DC:
High Prophet Set - 10% more damage taken per stack, up to 3 on target.
Divine Glow - 15% more damage taken, normal mode stacks with divine mode.
Prophecy of Doom - 10% more damage taken normal, 15% more damage taken divine (stacks).
Nimbus of Light - 5% more damage taken on targets.
Ok, there are just part of DC's dungeon tips, if you intensive studies in this neverwinter class, you will find more useful tips