Hi, I'm fairly new to Total Rewards, I just signed up a few trips ago.. I'm curious how the "rewards credits" work. I feel a little dumb, but I can't find any clear answers online. What can I redeem them for? How do I redeem them? and what are they "worth" persay.. Like, could I use them to book rooms? Or if someone could point me to a spot on their website that has more info that would be great.