Crowdfunding is best used after building a prototype product (Step 3) to validate market interest, as it allows gathering feedback on whether people want to actually buy the product. It is important to have a working product and video before crowdfunding, to prove the concept and that some people want the product. Crowdfunding then determines how many people want to purchase the product, which can range from 100 to 1000 buyers or more. It lowers barriers for new businesses compared to traditional options like loans, grants or investors that require paperwork, time or large ownership stakes.