This is powerfull module for creating omline store.
shop by Drupal
Drupal Commerce certainly raises questions beginners because it is big, and its structure is not easy to learn the first time. One problem - the frequent occurrence of errors. In Commerce mistakes do happen during the setup phase. Therefore, the lesson is dedicated to installation, configuration, line.
This artice translated from russian by Google Translate, bit corrected by tlito.
The material in the process of writing.