Barefoot shoes are zero drop, which makes it possible for you to stand straight with your body aligned. By contrast, most shoes you find in the store have a heel. Even most sneakers and ballet “flats” are not totally flat from heel to toe, which pushes you forward and requires compensations somewhere up the chain. This is why a totally flat sole is a non-negotiable feature of barefoot shoes, and it can improve your spinal alignment and alleviate back and neck pain.
To learn more about the features of barefoot shoes and why they matter, read the article on The Benefits of Barefoot Shoes.