registry

I honestly can't understand what the point of a gift registry is to begin with. Is it to show the items that people are buying? Why do I scan it? Nothing seems to change any differently once I scan and they finish the transaction. Had a lady get angry at me today because she wanted gift reciepts...

third day of cashiering today and a guest comes up with a bunch of items and a bunch of pieces of paper and says their on the registry.... i was like okay And just scanned the items then the registry and selected the items i thought she said... idk. i just wanna know what on earth is the...