Points to note about GA4 custom dimensions

[tmonower111]

By setting custom dimensions in GA4, you can perform your own analysis and accurately understand user behavior. However, custom dimensions also have limitations. Here are three points to note.

Consider which custom dimensions to redefine from UA to GA4
If you want to reflect the custom dimensions you used in UA in GA4, you need to check in advance what you want to measure because there is a limit to the number of settings.

You can archive unnecessary custom dimensions and list of usa cell phone numbers set new ones. Note that UA limits the number of custom dimensions to 20 across all scopes.

You cannot delete custom dimensions once they have been created.
Custom dimensions and custom metrics cannot be deleted even if they are no longer needed.
However, they can be archived, so use the archive function if necessary.
Although they cannot be deleted, their contents can be edited.

▼ Open "Custom Definitions" from "Settings" in step
GA4, and click on the right side of the custom dimension you want to archive. Select "Archive" from the options and you're done.