Install ExitPops
You add ExitPops with one script tag. Paste it once and it runs on every page of your site. The full per-platform guide ships with the app, with copy-paste steps for each setup below.
Plain HTML
Paste this once, just before the closing body tag, with your own popup id:
<script async src="https://cdn.exitpops.com/embed.min.js" data-pop="POP_PUBLIC_ID"></script>
Shopify, Webflow, WordPress, Google Tag Manager
Step-by-step guides for each platform are in the dashboard, including where the tag goes and which content-security-policy entries to add if you use one. The dashboard also tells you the moment your first popup goes live.