Norton Utilities Premium - what does thumbs up/down mean

I was using the Startup Optimizer in Norton Utilities Premium, under potentially unwanted items. Under the Community Choice column it indicates thumbs up or thumbs down. What does this mean?

[Edit: Clarified subject line]

The thumbs up and down refer to the % of NUP users that feel the item is useful or not. You can use that information to help you decide if you want to keep or turn off each item.