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On any website, pagent goes into the <head> of every page. If your pages share a template or layout file, you only need to add it once there. Copy your pagent snippet. You find it in the install step after you start your trial, and any time later in pagent under Settings → Setup. It looks like this, with your own client key:
Paste it unchanged. Don’t add async, defer or type="module": pagent needs to load before your page shows, so visitors never see the original flash.

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Add the snippet to your pages

1

Open your page template

Open the HTML of each page, or the shared template or layout file your pages use.
2

Paste the snippet early in the head

Paste your snippet as early as possible inside <head>: right after <meta charset="…">, before your stylesheets and other scripts.
3

Publish

Upload or deploy the change to your live site.
Building with a framework such as Next.js, Nuxt or SvelteKit? See Frameworks.

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Check it worked

  1. Open your site in a private browser window, so no cached version shows.
  2. Back in pagent, click Check connection in the install step. If you’ve finished setup already, open Settings → Setup: it shows You are ready once pagent has received visits from your site.
  3. pagent loads your live site and looks for the snippet. When it finds it, you can start your first test.
pagent couldn’t find the snippet? Make sure you published or saved the change on your live site, then check again. If you installed it through Google Tag Manager, open your site once in a normal browser window first.