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Analytics detection: what runs on your page

Best practices1 min readFixes check ga4-or-gtm-present

We list the analytics and tag-manager scripts we found, so you can confirm nothing unexpected is tracking visitors.

Step by step, with screenshots: GA4 and Tag Manager: what they cost your page and how to load them →

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What it is

Analytics detection lists the analytics tools and tag managers that run on your page, such as Google Analytics 4, Google Tag Manager, Matomo, Plausible, Meta Pixel or Hotjar. getReport finds them from the scripts and requests the page makes.

Each one adds requests to the page and privacy obligations to your site: it may set cookies, need consent and appear in your privacy policy. Old tags from past campaigns and agencies often stay in place for years, collecting data nobody reads.

OK looks like this: only the tools you actively use are present, each is listed in your privacy policy, and those that need consent wait for it. getReport lists every analytics tool it detects for you to review.

What a passing site looks like

  • Analytics and tag managers: passesinfo onlyeffort S

Analytics and tag managers

Why it matters. Knowing which analytics and tag manager run on the page helps you check they load only after consent and that no old trackers are left behind.

How to fix it.
  1. Remove trackers you no longer use; each one adds requests and privacy obligations.

Questions people ask

What is Google Tag Manager?

Google Tag Manager is a free tool that lets you add and manage tracking tags, such as Google Analytics, ad pixels and conversion scripts, from a web interface instead of editing the site's code. You install one container snippet on the site, and everything else is configured and published in Tag Manager.

What is Google Tag Manager used for?

It is used to deploy and control marketing and analytics tags: firing Google Analytics, Google Ads, Meta Pixel and other tags on the right pages and events, tracking clicks and form submissions, and connecting tags to a consent banner so they wait for permission. It does not collect data itself.

How does Google Tag Manager work?

The container script on your page loads the configuration you published. It watches for triggers, such as a page view, click or form submission, and when a trigger matches, it fires the tags attached to it and passes along variables such as the page URL or order value. Every change is versioned.

Is Google Tag Manager the same as Google Analytics?

No. Google Analytics collects and reports visitor data; Google Tag Manager is a container that loads tags, including the Google Analytics tag. You can use Analytics without Tag Manager, but Tag Manager makes it easier to manage several tags and to connect them to consent.

Filed under Best practices. Copy is generated from the same catalogue that scores every report, so what you read here is what the report says.