What elements must be above the fold on my product pages?

As an e-commerce business owner, I'm struggling to understand which critical elements should appear in the first visible section of my product pages. I want to optimize my page layout to immediately capture visitor attention, provide essential information, and increase the likelihood of conversion. My current design feels cluttered and ineffective, and I'm unsure how to prioritize the most important visual and informational components that will drive potential customers to make a purchase decision quickly.