Promotion - universal key or knife or blade? In today's marketplace, promotion policies are gradually playing an important role in business strategies. In particular, when the business is gloomy, consumption is reduced, and the store faces the risk of closing, promotion is the inevitable option. However, promotion is not a "universal key" to solve all problems, on the contrary, it is a "double-edged sword". It can bring great profits to retailers but can also bring about annoyance. But every retailer has to take risks, like knowing that the front is a deep pit but still has to jump over. In the battle of promotions, the effectiveness of different promotion policies is also diverse. There are retailers who only need one promotion activity to be able to defeat their rivals and establish hegemony in the market; But there are also retailers after promotion with average effect, consumption does not flourish, even more capital losses and face more difficult situation. Why are there such big differences? The problem lies in the choice of the promotion plan, which includes the purpose of the promotion, the opportunity and how to proceed with the promotion. Choosing a good promotion plan not only increases the retailer's consumption but also helps them to surpass other competitors. On the contrary, choosing an unreasonable promotion option will not promote the consumption and consumption of human and wealth, increase the burden on the retailer, even create conditions for the opponent to take advantage of robbery. losing market share. Therefore, choosing a reasonable promotion plan is a big problem that all retailers have to consider carefully.