User Agent
CNIL recommendation
The reprocessing of information that can be used to generate a fingerprint, such as "user-agent" information, to eliminate the rarest configurations that could lead to re-identification;
Solution
The CNIL talks about reprocessing information such as the user_agent
or the screen_resolution
. In my opinion, there's no point in sending this information if Google Analytics can't understand it.
We'll remove these fields from the request sent to GA4.
For the user_agent
, in the tag configuration, we'll add this field to the list of parameters to exclude ('Event Parameters' > 'Parameters to exclude').
![Excluding User Agent Parameter from GA4 Tag Configuration](/images/cnil/exclude_user_agent_parameter.png)
We could do the same thing with the screen_resolution
field, but by adding this field to the list of parameters to exclude, this field mysteriously remains in the query. We'll add it to the parameters to be added/modified, but leave its value empty.
![Adding Screen Resolution Parameter with Empty Value](/images/cnil/screen_resolution_empty_value.png)