What is NAV? What is the relation with the growth of money in insurance?

What is NAV? It stands for Net Asset Value. In the context of insurance the value of accumulated cash value within a policy may be based on various indexes or mutual fund like investments. Because these products are based on investments the valuation and therefore the growth (or decline) in your cash value changes everyday.

To check the NAV you would generally go the the online service portal of the insurance company. The NAV would be published daily.

I believe you are referring to Swift which "is a member-owned cooperative through which the financial world conducts its business operations with speed, certainty and confidence. More than 9,700 banking organisations, securities institutions and corporate customers in 209 countries trust us every day to exchange millions of standardised financial messages"

Read more about them @ http://www.swift.com/about_swift/index.page?

I think you need to start looking things up in Wiki, starting with "Net Asset Value".