You can test the market demand for your product before launching it. Allowing you to avoid getting short of stock or having over-supply in case your campaign fails.
Generate buzz around your brand. Expanding your brand awareness and give you a chance to generate more leads.
Getting upfront revenue to fund the development of your product (in case the pre-orders are paid). And if you charge the pre-orders on release, it can give you an estimate for your future success.
Serves as a source for great testimonials and customer research if done successfully. You can also get a lot of user-generated content when the product is finally on-stock.
