What’s a requirement for implementing sitewide tagging?

Use just the image portion of the JavaScript.
Make sure the tag still works by loading it within another tracking tag, like Floodlight.
Make sure Google Click Identifier (GCLID) still works if using click trackers in the URL.
Turn off auto-tagging in all your Google Ads accounts that are enabled for sitewide tagging.

The correct answer is:

Make sure Google Click Identifier (GCLID) still works if using click trackers in the URL.

Sources: Google Ads Measurement Certification Assessment Course

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