shutdown vs Hibernate

  Shutdown completely c loses the open documents and programs and turns off the computer.
               Hibernation is a power-saving state designed primarily for laptops.It  puts your open documents and programs on your hard disk, and then turns off your computer.use hibernation when you know that you won't use your laptop for an longer  period and won't have an opportunity to charge the battery during that time  and this helps in faster booting up the system
              The only negative effect that I'm aware of  hibernating is that it places more locked clusters on the partition, thus using more space and increasing fragmentation.