Once you've selected a business model, you need to figure out how you're going to execute it. Do you want to sell products? Offer services? License your technology? Advertise? There are many options, and you need to choose one that makes sense for your business. There are a few different ways to make money, and you need to figure out which one is right for your business. And if you can't give them a clear answer, they're going to be hesitant to invest. When you're pitching your business to potential investors, they're going to want to know how you're going to make money.
If you're not sure how your business will make money, you're not ready to raise money from investors.