Glad you asked...
A proof of concept justifies a concept you may have such as starting a new business. If you want to get a loan for your business, you need facts and numbers so the bank can see what the profitability of your plan might be. Here is a good description: http://www.ehow.com/how_2315867_do-proof...
Then again, this answer might help you...
Basically, a proof of concept is a written document requested by potential lenders to ascertain if there is viability in a business or product that can be financed.

