I'm using ChatGPT to generate marketing copy for my e-commerce store, but the results feel too generic and don't convert well. How can I optimize my prompts to create more unique and persuasive copy?

I've been experimenting with basic prompts like 'write a product description for a coffee maker,' but the output lacks a compelling tone and fails to highlight the unique selling points. I'm on a tight timeline and budget, so I need efficient ways to scale this without hiring a professional copywriter. I've also tried tweaking the prompts slightly, but it still feels flat.