The Measurement ID identifies your website’s data stream in Google Analytics 4. It tells your tracking which GA4 property should receive visits and events.

What you are looking for: a code in the format G-XXXXXXXXXX. Do not confuse it with a GTM container ID, which starts with GTM-.

Before you start

You need access to the Google Analytics property used by the website. If there are several properties or streams, confirm the website domain before copying the ID.

How to find the GA4 Measurement ID

Open Admin

Google Analytics 4 home screen with Admin highlighted — Open Admin to access account and property settings.

Open Data streams

Under the property, find Data collection and modification and select Data streams.

GA4 Admin menu with Data streams highlighted — Data streams show where GA4 receives Web, Android, or iOS data.

Select your website’s Web stream

Choose the stream whose URL matches the website you want to measure.

GA4 Web streams list with a website stream selected — Check the domain carefully if the property has several streams.

Copy the Measurement ID

In the stream details, find MEASUREMENT ID in the upper-right corner and copy the code beginning with G-.

GA4 Web stream details showing the Measurement ID — Use the copy button to avoid typing errors.

Where to use it in ETM

Select Google Analytics 4 as a destination in Easy Tag Manager and paste the ID into the requested field. ETM prepares the tags in a workspace for you to review before publishing.

Quick check

The ID starts with G-.
The selected stream shows your website domain.
It is not a GTM- container ID or only the Analytics property number.

NEXT STEP

Found what you needed?

Open ETM, choose your GTM, and use this information to prepare the tracking.

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