Difference between Bootstrapping, Crowd funding, Angel Investors, Strategic Investor
It is an effective investment method where you can invest from your personal savings or can ask your family and friends to contribute. This is a much easy approach since there will be less formalities/compliances.
It is like getting a loan, contribution, pre-order, or investments from more than one person at the same time. It is a competitive place to earn funding, so unless your business is completely rock solid, you may not find it useful.