In a new Amazon store, the fixed bid setting needs to be considered comprehensively based on factors such as the product's profit margin, competitor's bids, and the purchasing power of the target audience. It is recommended to set a lower bid in the early stage, observe the ad display effect and click-through rate, and gradually adjust the bid to adapt to the market competition environment. At the same time, by analyzing advertising data, timely adjust the delivery strategy, improve advertising ROI, and achieve better advertising results.