* The instruction is for store which upgraded Thank you and order status pages

1. Go to checkout setting:

https://shopify.com/admin/settings/checkout

2. Click "Customize" to open editor.

3. Select "Thank you" or "Order status" page on the top bar.




4. Select "Section" in the left menu:




5. Add app block at the bottom of left menu:


6. Then drag and drop to customize widget location like the attached screenshot:



7. You can place a test order with 100% discount and free shipping to view the widget.


To offer 100% discount and free shipping, you can create 2 sale offers and restrict them using landing link eligibility option: 


https://treedify.freshdesk.com/en/support/solutions/articles/43000584910-preview-offer