1. The best plan is formulated according to the purpose and budget of advertising.

2. The following factors need to be considered: target audience, advertising type, keyword selection, bidding strategy, delivery time, geographical location, etc. Different plans can be adopted to achieve the best results according to different purposes and budgets.

3. The content that can be extended includes: how to determine the target audience, how to choose advertising types and keywords, how to formulate bidding strategies, how to evaluate the delivery effect, etc. At the same time, it is also necessary to pay attention to the rules and restrictions of Amazon advertising to ensure the legality and effectiveness of advertising.