Many factors influence these shopping decisions, including in-store promotions, store ambience and cleanliness, level of service, price, value, logistics, and overall retail experience. Retailers compete with each other on these various attributes to win the patronage of consumers. Consumers, in turn, must sift through the options made available to them and decide not just which product and brand to buy, but where and how to buy it. For some purchases, consumers may never enter a store, purchasing instead from the Internet, a catalog, or through direct sales.