When you enter the online shop, data is transferred: texts, images – no cookies by the way – and the framework for displaying the content. This is done in the most reduced form. The start page here requires 0.015 MB. An average website is assumed to be 2 MB. The data is transferred from the server in a data center via a network - Internet node, provider, router - to your computer. One estimate states that around 5 KWh are consumed per GB.