Product Source refers to xml and/or Excel files that you added on StockMount management panel and products that you added manually.
There are three possible ways to add product to system on StockMount. The first one of these is to add product on Xml format. You can add Xml files that you have got from your supplier or have produced from your commercial program, to system by giving name to each one. Besides, you can add your products to the system with product source name by entering product information by yourself. As a result of all of these additions, you have as many product sources as the number acquired by adding Xml and Excel files to StockMount product source.