Amazon is filled with fake reviews that hope to bolster a products review score. Fakespot is an online tool that helps you separate the junk reviews from the useful ones.
All you need to do is copy and paste the Amazon link into Fakespot, and it will generate a review score. If you want to dig deeper, you can see which reviews Fakespot thinks are inauthentic. It's not a perfect tool, as many of these reviews could still be real, but it's useful when you're trying to figure out if user reviews are worth paying attention to or not.