Amazon suffers from the same shit that social media suffers from. The platform isn’t bad but the userbase (sellers) is out of control and unwieldy, and whatever automated tools they have to control it aren’t worth shit.
I have clients with web stores with hundreds of products, and they can’t be fucked to fill in all the right details for each item. The details are missing or incorrect. Amazon has thousands of sellers each selling hundreds to thousands of products with missing or incorrect details.
Then Amazon also has shady sellers that try to manipulate their exposure in search results by purposely adding incorrect information. And/or flooding the results with slightly tweaked “different” versions of products sold by “different” sellers who are all the same.
Because of all the missing details (I promise you most listings for 10" thingies have totally not included the 10" in their item detail field for “size” because that’d be too tedious for the seller), Amazon probably has a helpful algorithm to help fill in details for items based off their title. This is why you see items titled like “RED ROUND MICKEY MOUSE CLOCK ANALOG 12-INCH FACE TIMEX” where on a regular store with its own curated inventory it would just be titled “Mickey Mouse Clock.” Because they can use those titles to inject themselves into search results and be lazy on the fine details.
Amazon even has sellers that switch up their products within their product page. Check out reviews sometimes…they’ll be for a completely different product than you’re looking at. The sellers will replace an item with a lot of positive reviews with some new, unrelated item and get themselves better search results based on the ratings of the other product. Whee!
Anyway, Amazon sucks since they opened themselves up to third party suppliers/sellers. It’s the Wild West out there. Wal Mart did the same and their search is just as messy. I even find that Etsy search results get similarly messy, with people trying to get an edge by fudging details and ending up in random search results.
You get the best store search results when you have the most product attributes to catalog, and none of the sellers are doing it. Or if they’re doing it, they’re doing it half-assed.
Google does it better because, as someone else said, they are scraping the words on the page and have more intelligent algorithms. But Google isn’t trying to be a store so they HAVE to have these powerful algorithms. Amazon is probably pulling their hair out saying “HEY WE ARE A STORE SO JUST ADD YOUR PRODUCT ATTRIBUTES THEN EVERYTHING WOULD BE EASILY FILTERED.”
Don’t get too deep into Amazon search results. After the first few items or so, it’s all bullshit.