Just to give some clarification to the info I'm offering--
RR--register rewards--these are given on specific items throughout the month at Walgreens. They are considered manufacturer's coupons. You can use them like cash on your next visit with certain criteria. 1. Your purchase amount must equal or exceed the amount of your RRs. 2. You must purchase 1 item per RR coupon. i.e. if you have a RR for $1 and another for $5, your total purchases must equal or exceed $6 plus you must purchase at least 2 items. The other thing to remember is that if you have a RR for $1 for Bayer aspirin and a RR for $1 for Vitamin water and you want to purchase another Bayer aspirin to get another RR, you may use the $1 RR from the Vitamin water to pay for the Bayer aspirin and you will get the new RR from the aspirin, but if you use the Bayer $1 RR to purchase the Bayer aspirin, it will recognize it and not kick out another RR. You want to alternate your purchases. Another thing to keep in mind is that RRs usually expire in 2 weeks, so you'll want to keep on top of them.
ECB--Extra Care Bucks--these are given on specific items throughout the month at CVS. These also can be used on your next purchase like cash. Once again, I believe that you must use the entire ECB amount on your coupon for the purchase as they don't give change. However, these are not manufacturer's coupons so they don't have to be attached to an item. I'm still new to CVS so I'm learning. At CVS, you earn 2% on everything you buy and every 3 months, when you use your card, ECB's from those earnings should print out on your register receipt. Don't lose those or let them expire! They are like cash! Usually they have about a month before they expire. So CVS has 2 ways to earn ECB's.
IP--when you see this, it usually means an internet printable coupon.
Q--short for coupon.
wyb--short for when you buy.
B1GO--short for Buy one, get one. Also seen as BOGO.
I'm sure there are more, but that gives you an idea. If you have questions, please ask!