I want to track some metrics of my webpages (such as the "Average Engagement Time" or the clicks on the ads), switching from one web design to another, by creating a custom dimension in GA4.
I'm a GA4 newbie, and I was told to add a parameter to the 'page_view' event through 'gtag':
gtag('event', 'page_view', {'design_option': 'A'});
This is, for each one of the designs of the webpages ('A', 'B' or 'C'), I establish a different value for the 'design_option' parameter.
As far as I understand after reading some documentation, the 'page_view' event is one of the GA4's "automatically collected events", linked with the statistics of the views of webpages.
I would like to know if adding a parameter to 'page_view' event is risky or not.
No, you can add parameters to it and it will all be good as long as the parameters don't exceed the cardinality limitations. Also, make sure you know your event properties limits.
When you exceed the cardinality limitations, it's not too bad either, it just shoves some of the values under the "Other" blanket.