It's really convenient to have a list of all of your orders in one place. If you have previously used another system for e-commerce, you don't want to have to log in to multiple accounts to see whether someone made a purchase at one time. You also want all of your analytics in one place. It would be a shame to not see the growth of your store in one graph. You want to have all of that data in one place so you can get the most out of reports.

For these reasons, WooThemes released an importer to help users import their orders, customers, and even coupons.