The Discover it® Cash Back card offers up to 5% cash back in rotating categories on the first $1,500 spent each quarter, with 1% on all other purchases. It has no annual fee and features an unlimited cash-back match at the end of the first year, alongside a 0% intro APR for 15 months on purchases and balance transfers. Cardholders must activate quarterly cash-back categories, which can include grocery and drug stores. Benefits include online privacy protection and a $0 fraud liability guarantee. The card is ideal for those looking to maximize rewards with flexible cash-back options.