Some web pages have star ratings, which are shown in the results list.
These ratings are in most cases worthless, since it's something that the webmaster assigns to each page. Thus, you will notice that when stars are implemented, it will in 99% of cases be 5/5 stars. Of course - who wouldn't give their own product a 5/5 rating?

My suggestion is for Kagi to not put the star ratings in the search results. Or perhaps make a small whitelist of some important sites which use the star system honestly to show the actual user reviews of a product.
Much more interesting would be to get the "priceCurrency" and "price" metadata instead of the rating.