It is a text-to-image generator, a Generative AI model that employs Deep Learning technology to create photorealistic images.
If you're good at creating prompts that produce specific styles in Stable Diffusion, you can sell them on marketplaces like Prompt Base.
You can list your generated images on websites like Adobe Stock, Shutterstock, and Pond5, which provide royalties for each image they sell.
You can sell your arts and designs on T-shirts, mugs, pillows, etc. For this, you can use platforms like Printful, Printify, Sellfy, etc.
You can sell your artwork as NFTs on a blockchain for potentially high returns. If you created something amazing then you can use a marketplace like OpenSea, Rarible, etc.
You can use Stable Diffusion to create art for public domain books and sell them digitally or in print on Amazon.