Amazon - Referral // Reference - What is “ref=nb_sb_noss_1“

What is ref=nb_sb_noss_1?

When I was on Amazon earlier this afternoon, I went to just view Amazon reviews on some of Jim C Hines' books. Just for the sake of curiosity. But when I entered the search term "Jim C Hines", Chrome started downloading a "ref=nb_sb_noss_1" file. I've never seen this before. Is it a virus or spyware, etc.?

it is an amazon code for affiliate referral and how most get affiliate paid.

examples ;  

https://www.amazon.ca/Spalding-Ultimate-Basketball-Official-Composite/dp/B07L36B7K5/ref=asc_df_B07L36B7K5/?tag=bingshopdesk-20&linkCode=df0&hvadid=&hvpos=&hvnetw=o&hvrand=&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=&hvtargid=pla-4584345021457972&psc=1


https://www.amazon.ca/s?k=Oral+B+Pro+1000+Power+Electric+Toothbrush&ref=nb_sb_noss


https://www.amazon.com/s?k=bag+leather+handles&ref=nb_sb_noss_2

description ::

https://kindlepreneur.com/amazon-search-url-isbn-ref/