In exceptional cases, it is possible to upload the products by using a product feed. This is an XML, CSV or TXT file containing all the data of all your products. It is also possible to provide a Google Docs document containing your products. It is important that the Google Docs document is publicly accessible (and not password protected). If you are using Google Shopping, you probably will have a product feed uploaded in the Google Merchant Center. It is possible to use this feed for Bigshopper. Of course, it is also possible to create a new feed and tag the landing page URLs (so you can measure the traffic from Bigshopper in for example Google Analytics). Bigshopper can import almost any kind of feed, preferably one that is as extensive as possible and meets the Google Shopping feed specifications.