Often times merchants use this app to redirect customers from one shop to another as they have different shops to serve different regions.
If you could like to learn more about redirection feature, check this link.
When you redirect customer from ShopOne to ShopTwo, you might not want to do zip code validation on ShopTwo again as customer has already validated themselves on ShopOne.
If you would like to avoid validation on ShopTwo, while redirecting, please add following additional query param to a URL customer is being redirected to.
Lets consider a scenario where you are redirecting customer from shop-one,myshopify.com to shop-two.myshopify.com. Then while setting up zip code sets in shop-one.myshopify.com, add redirect URL as below