Install pinreview on WordPress, Webflow, or Shopify
The snippet is the same everywhere. Only the place you paste it changes. Copy it first from your project's Install page.
WordPress
If the site already runs a code-snippets plugin, add it there. That survives theme updates.
Otherwise add the snippet before the closing body tag in your child theme's footer template. Don't edit the parent theme, because your change disappears on the next update.
Webflow
Open Project settings
Go to Custom code
Paste the snippet into the "Before body tag" field
Save, then publish
Custom code only runs on the published site, not inside the Designer.
Shopify
Add the snippet before the closing body tag in your theme.liquid file, under Online Store, then Themes, then Edit code.
Duplicate your theme first if the store is live.
Anything else
Any platform that lets you add a script before the closing body tag will work. If yours doesn't, use the browser extension instead.