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Category killer is a term used in marketing to describe a company or service that has some competitive advantage so significant that it can dominate a marketplace. The definition most often is associated with the term big box that is a nickname applied to large a large retail chain that specializes in one segment of a market (low-cost-provider) or one vertical industry (office supplies, construction supplies, etc.). Many such category killer retail chains have had a negative impact on traditional types of retail small businesses due to the chain's ability to use leverage with suppliers in order to provide customers with lower prices and more variety of products. However, some small businesses have benefited from such chains that serve as wholesale sources, or that are located nearby, providing increased customer traffic to their business.