You can easily find the CHANGES for every release though you may need to manually go to the NVidia driver site as I think Geforce Experience only shows the highlights of that.
Then, look down and see if any changes apply to your GPU, game, or for your version of Windows.
For example, you might see "SLI fix flickering for Spider-Man Sux" which is pointless if you do not have SLI and also that game.
The last update (v355.60) had absolutely nothing that applied to my specific setup.
Other:
NVidia drivers also eat up a lot of space. I recommend periodically looking at the Program Files where it's stored and delete older folders for drivers.
Finally, for Windows 10 (may apply to previous) I tried to "ADD" a game for 3D manage settings, however my game would not show up. Originally, Windows 10 had found and downloaded the drivers. I forget if I had to add Geforce Experience myself, but regardless the SOLUTION to this and other issues I've had in the past was this:
*Reinstall latest driver using Custom->Clean install.