A business or industry in which the Amazon company, because of their financial resources, economies of scale and shipping capabilities, could easily enter and sell the products at a lower price and ship them faster than existing companies in that industry.
Because it is expensive and not easy to ship sheets of plywood and drywall like it is books and other small products, home improvement businesses like Home Depot and Lowe's are not easily Amazonable. Amazon {business online shopping Cyber Monday