This module is useful to define multiple products in one custom template and load all products on a single click in the purchase order. How exactly it works, First need to create a custom product template and add a different kind of products in that, you need to select that template in purchase order and auto all related products of that template will be added in the purchase order line. you have done! it will make your effort very less otherwise you need to add that all products one by one in the purchase order line. Another thing is you can add products to a special price discount. so it makes this function more beautiful. Product Template is like product bundles or combo packs – extension for creating configurable product packages: With Bundles, you can quickly build complex products or create simple discount combos by mixing simple and variable products. It's very easy to configure, fast forward in the purchase process.