Your Angel Investor is a private individual (a business person, friend or sometimes family member) who can see the value in your business idea and will contribute money to help get you started. Usually Angel Investors want repayment with interest or a slice of the profits in return for their initial contribution.
Ron Conway is a famous Angel Investor who contributed during the early days of Google, PayPal and AskJeeves.
His current number of investments stands at more than 130. He has provided companies with many millions of dollars to help them achieve their goals and their success contributes to his success.