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Once you have installed the tracking code, check to see if your cmo email lists site's data is being collected. Before checking, visit the site once and click "Real-time" → "Overview" in the left menu of GA to check. If there is at least one visitor, data has been collected.
After checking, we recommend that you exclude your own access and link your account with Google Search Console. Please refer to the following article for information on how to set it up.
[5 Minutes] How to Link Google Analytics and Search Console
How to delete a property (site)
This article explains how to delete a property (site) from GA. Log in to GA, open the management screen, select the relevant account, and follow the steps below to delete the property.