Among the myriad of tactics that e-commerce businesses can use to pump up sales, preorders might be the most overlooked strategy. Yet preorder sales are a highly effective way to generate early buzz to gin up demand for new products. A “preorder” is the sale of a product that is not immediately available to the consumer but will be sometime soon. The product may still be in the development phase. It may already be manufactured and packaged for sale but not yet available in stores. Just as likely, the retailer is simply holding back.