The simple steps behind a successful product

People don't care about your product, only the result that comes from using it.

1. Identify a problem in people's lives
2. Build something to fix it better than what's already out there
3. Create a brand behind the product that portrays the right message
4. Deliver the promised result

The following quote does a good job explaining step 3:

"People don’t buy what you do, they buy why you do it." — Simon Sinek

But don't forget, you should never start something with the sole intention of making money.