Although entrepreneurship creates products, it actually creates word of mouth. With high-quality products and powerful marketing methods, products can be promoted smoothly. On the other hand, if there is no good product, even if there is a good marketing model to promote the product, it will eventually ruin the good reputation because of quality problems. Therefore, products in the start-up period are the most important. Entrepreneurs must understand that marketing comes first, not marketing first, and marketing will always serve products.