This gives whatever it's attached to (creatine or arginine are common) superior absorption.
L- form amino acids are absorbed and used by the small intestines for nucleotide synthesis. AKG aminos on the other hand are shuttled directly to the muscle cells making AKG products popular in the muscle and strength building communities.
This makes AKG aminos the perfect choice if your goal is building muscle, but maybe not the best choice if you have more generalized health goals. AKG drives the amino acid into muscle cells creating a pro-muscle growth environment.
As a bonus once that AKG has shuttled the attached amino acid into the muscle cell it is then converted by the body into glutamine.