Curation Rewards are one of Hive Blockchain features as you know.
At this moment it means everytime you upvote someone post (or comment), 50% of the value of your vote power return to you, 50% goes to author.
My daily curation rewards are about 3.. 4 hive.
I have right now 11,159.009 HP (Staked Hive Tokens - Hive Power) and give about 25/30 upvotes per day.
According to https://hivestats.io/ my Curation APR is 11.5%