Essential Rewards or "ER" is an optional no strings attached monthly wellness box that you get to customize. You can earn points on purchases and get free shipping over a 100 pv. If you switch your spending and buy oils, supplements, skincare, makeup, einkorn flour etc. from Young Living every month anyways it's a no brainer that you'll want to join. I use my points to get free Frankincense and other products monthly!