Google Tag Manager is the great tool to apply and manage the pixel in your sites.

You can also add Integrate Pixel into Google Tag Manger by the following steps:

1. Firstly, you should create the tag, and you can find the Integrate pixel under here.
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2. Secondly, add the new tag and submit it.
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3. Last, you can add the submission configuration for the tag.
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Feel free to let us know if you have any questions.