Level of training webmaster: any
If you used
Google Tag Manager to add and update tags on your site, you can quickly and easily confirm ownership of it. This is done in Webmaster Tools using
the container fragment code .
Do the following:
1. On the Webmaster Tools home page, click
Manage Site and select
Confirm ownership of this site . If you haven’t added it yet, click the
Add site button at the top right.
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To do this, you must have “View, Edit and Manage”
permissions at the account level in the Google Tag Manager.
2. On the confirmation page, select
Google Tag Manager as the verification method and follow the instructions on the screen.

3. Click
Verify .
Done!
If you have any questions about this verification method, visit the
Webmaster Help Forum .