It is especially important to limit the number of round trips between the server and client for CRS-IUA because the client is mobile. This is why CRS-IUA limits the number of requests to render a given page to just one.

Additionally, it is important that the responses to actions contain information that can be used to update the view in response to that action. One example is the cart view, where the response to the request that performs the add-to-cart action contains the updated cart item count that can be used to update the cart badge.