Generate 50 unique prompts designed to optimize Etsy and Gumroad product listings for maximum sales.  Each prompt should suggest specific improvements or additions to a product listing, focusing on different aspects such as title, description, keywords, images, pricing, and overall presentation.  The prompts should be actionable and detailed, providing clear instructions on how to improve each element.  Consider variations in product types (digital downloads, physical goods, courses, etc.) and target audience.  Prioritize prompts that address common issues like low conversion rates, poor search ranking, and ineffective marketing.  The output should be a numbered list, with each prompt clearly indicating the specific area of improvement and providing examples of effective phrasing or strategies.  Success will be measured by the ability of the generated prompts to improve product listing performance metrics, including conversion rates, click-through rates, and sales volume.