Drupal Commerce is used to build eCommerce websites and applications of all sizes. At its core it is lean and mean, enforcing strict development standards and leveraging the greatest features of Drupal 7 and major modules like Views and Rules for maximum flexibility.
Commerce Kickstart is the quickest way to get up and running with Drupal Commerce. It includes the latest versions of Drupal core, Drupal Commerce, and the other modules it depends on. It also gives you a set of options to create a fully-featured demo store out of the box complete with an attractive theme, catalog and search configuration, and a custom back office interface.