Another common mistake is not testing different ad formats, targeting strategies, or bidding strategies. Without testing, sellers may miss out on opportunities to improve the effectiveness of their campaigns and may not be able to fully optimize their ad spend. To avoid this mistake, sellers should regularly test different ad formats, targeting strategies, and bidding strategies to identify what works best for their specific products and target audience. This can help to improve the overall performance of their campaigns and ensure that they are making the most out of their advertising budget.