Achievement Rewards let you trigger a Reward for players based on rules. Setting a Reward is optional. You can create multiple Rewards for an Achievement.
To create a Reward, click Add and fill out the information as in the screen example above.
To create a reward that will be issued to the player you need to fill out the details. Information like Name and Description is for the player to see when he or she receives the reward. Other information like Value, expires in, etc. configures the Reward.