How would using a specific backlink help a company with digitally advertising its products on a famous customer followed platform?

in this case:the website stevespaleogoods.com sells Paleolithic food with no dairy, sugar, or grains. snacknation.com would be a good website from which Stevespaelogoods should try to get a backlink. The website accumulates a wide variety of paleo snacks on a single platform. It offers simple whole foods, like sun- dried tomatoes and kale snacks, which are part of the paleo eating style.