Shopify
Paste the tracker into your theme's theme.liquid so it loads on every storefront page.
Setup
Copy your site ID
Find it in the dashboard under Sites → your site → install.
Edit theme.liquid
In the Shopify admin go to Online Store → Themes → ⋯ → Edit code, open layout/theme.liquid and paste the tag just before </head>:
html
<script defer src="https://track.satsu.pro/tracker.js" data-site="YOUR_ID"></script>Duplicate the theme first if you want a safe rollback.
Verify it works
Open your storefront, then follow Verify it works. Shopify limits custom scripts on checkout pages; check which pages report in your dashboard.