To make a free product, if order subtotal exceeds some value:

1. In the administration panel, go to Marketing > Promotions.
2. Click the + button on the left and choose Add cart promotion.
3. Fill information in the General section.
4. Open the Conditions tab and click the Add condition button.
5. Select the Order subtotal option in the opened select box, then select equal or greater in the opened select box and enter the desired value in the opened input box.
   

   
   
   

6. Open the Bonuses tab and click the Add bonus button.
7. Select Free products in the opened select box, click the Add products button, select the desired product in the opened window and click the Add products and close button.
8. Click the Create button.