Courtesy of Merkle | Cardinal Path - http://cardinalpath.com/
This variable will help reduce cardinality issues with GA4 properties due high volume websites that also use query parameters.
- Select "Exclude All Parameters" to ignore all parameters exept ones provided in the whitelist field
- Select "Exclude Certain Parameters" if you want to select which parameter to exclude
- Provide the variable that will have query parameters, eg. Page URL
- Check "Force to Lowercasae" if you want to reduce cardinality
- Configure "Lower case exclusions" for allowed parameters that are case sensitive
- Reference variable in the GA4 config tag (eg. page_location), must be a valid URL