Microsoft are merely advising you that they have found a more recent driver for your graphics card than the one that you are currently using. If you want to know the details about the new driver then you need to look at the NVidia website for your card. That will list the changes they have made since the last update and the reasons why. New drivers are often issued to overcome problems found by users for example to speed up or fix glitches in certain games. If you don't suffer from the problems listed by nVidia or don't play the games that are listed then there is no need to update the driver. But if you have found that your graphics have behaved erratically in some applications then it is worth investigating to see if a new driver will fix the problem. Personally I always go with the Windows suggestion knowing that if it fails for some reasosn there is always the opportunity to roll back the driver.
I tend to disagree with that view, not just on graphics cards either. Updates can give added security, bug fixes, improved or new features and in the case of graphics cards improved frame rates/performance. However I would get the updates from the Nvidia site. Also create a System Restore point first.