When optimizing product images for ecommerce marketplaces, it is crucial to avoid common mistakes to ensure optimal performance and user experience. Here are some mistakes to avoid based on the provided search results:

1. Not Optimizing Images for Web: Failing to optimize images for the web can lead to slow loading times, increased bandwidth consumption, and negatively impact site performance and SEO. It is essential to reduce file size, resolution, and use web-friendly formats like JPEG, PNG, or GIF1.
2. Using Poor or Inconsistent Lighting: Poor lighting can make products look unappealing or misleading. Consistent and proper lighting is essential to showcase products accurately and maintain customer trust1.
3. Inconsistent or Inaccurate Colors: Using inconsistent or inaccurate colors can lead to customer confusion and dissatisfaction. It is crucial to ensure that colors are consistent and accurate across different devices by using tools like color calibration and correction1.
4. Showing Only One Angle or Perspective: Displaying only one angle limits customers’ understanding of the product. It is important to show multiple angles and details to provide a comprehensive view of the product’s features and benefits1.
5. Choosing the Wrong Background: Selecting a distracting or unprofessional background can detract from the product. Opt for backgrounds that complement the product, match your brand identity, and create a clean look1.
6. Not Testing and Improving Images: Neglecting to test and improve images can result in missed opportunities for enhancing appeal, effectiveness, and conversions. It is essential to gather feedback, analyze data, and conduct experiments like A/B testing to optimize images effectively12.

By avoiding these common mistakes and following best practices in image optimization, ecommerce businesses can enhance their product presentation, improve user engagement, and drive sales on online marketplaces effectively.