What's a requirement for implementing sitewide tagging?

Analysis of Correct Answer(s)

The core purpose of sitewide tagging for Google Ads is to accurately measure conversions. This is achieved by linking a click on an ad to a conversion action on your website.

• The Google Click Identifier (GCLID) is the key parameter that connects the ad click to the website session. It's automatically appended to your landing page URL when auto-tagging is enabled.
• Some third-party click trackers or redirect systems can unintentionally strip parameters like the GCLID from the final URL.
• If the GCLID doesn't reach the landing page, the sitewide tag cannot attribute the conversion to the Google Ads campaign. Therefore, ensuring the GCLID is preserved is a fundamental requirement for the system to work correctly.

Analysis of Incorrect Options

• Turn off auto-tagging: This is the opposite of what's required. Auto-tagging must be enabled in Google Ads for the GCLID parameter to be added to your URLs, which is essential for conversion tracking.
• Use just the image portion of the JavaScript: This refers to a non-JavaScript or <noscript> fallback. Modern, robust tracking relies on the full JavaScript to set first-party cookies and enable advanced measurement features. Relying only on an image pixel is an outdated and less effective method.
• Make sure the tag still works by loading it within another tracking tag, like Floodlight: This describes a practice called "piggybacking," which is not a requirement and is generally discouraged. It can slow down your site and lead to data discrepancies. Tags should be implemented directly on the page or through a tag management system like Google Tag Manager.