To install SatisMeter into the Shopify Thank You page, head to your Settings > Checkout page: http://myshopify.com/admin/settings/checkout
Scroll down to the “Additional content scripts” field as shown above, and paste the code found on this link.
You need to replace
YOUR_WRITE_KEY above with your actual Write key (you can find it in SatisMeter Settings / Integrations / API keys).
To show SatisMeter pop-up on the right-hand side, go to SatisMeter Settings / Customize Survey / Position on Screen, and change the value from "Footer" to "Bottom Right", as seen below: