For details of shopping categories, refer to «what is the definition» of each spending category and «what is included in your rewards calculation?». (gobear.com)
They give you more cash back for certain shopping categories (e.g. restaurant, gas, retail etc)-- 5 % cash back, in fact. (thedigeratilife.com)
Many cash back cards offer bonus points in general shopping categories, like groceries, department stores, and gas. (wisebread.com)