Buying in bulk means purchasing a large quantity of a product at once, typically at a discounted price per unit. The term "bulk" refers to the larger quantity of the product being purchased. Buying in bulk can be an effective cost-saving strategy, as retailers often offer lower prices when customers purchase larger quantities of a product. By purchasing in bulk, consumers can save money over time and reduce waste by buying only what they need and reducing the number of trips to the store. Common items that are purchased in bulk include food, cleaning supplies, personal hygiene products, and office supplies. You can also read more about bulk buying over at Wikipedia, here.