At each participating shop, scan the QR code for rating instructions. The more shops you visit, the more ratings you submit — so there's every reason to build the longest pizza crawl you can manage. Once you've finished your slice, submit your rating: one rating per shop, per day, regardless of how many slices you buy there. At the end of the two weeks, the shop with the highest-rated slice takes home the title of Best Slice of NYC Pizza Week.