structured products is just one kind of unit trust funds. I'll put it in a simple form:
Say you intend to invest, but you don't want to lose money. In order not to lose money, you need to protect your capital. If you have RM10k and you want to invest it but you also want to "guarantee" that no money is lost after 5 years, you can :
1. Put RM8219.27 in an FD, that guaranteed 4% p.a. for 5 years term. After 5 years, your initial sum of RM8219.27 will become RM10,000.
2. So now you are left with RM1780.73. Let's say you want that money being invested in real estate, the only choice is to buy a REIT stock. After five years, these portion of the money is your net gain.
Unit trust companies just introduce Structured Products to the public with the above features. Of course the investment tool they will be using are different. Instead of FD, they can use ZNID. (
http://kclau.com/investment/what-is-a-zero-coupon-negotiable-instruments-of-deposit-znid/)
Instead of buying REIT, they can have their own properties being turned into REIT. I am talking about different scale but the concept is the same.