- Custom table
- Custom user parameter
- Custom metric
- Custom dimension
The correct answer is: Custom dimension
As you manage a blog that has a few contributing authors, you could use custom dimension to report the name of the author on each article page.
A dimension is an attribute of your data. It describes your data and it’s usually text as opposed to numbers. Dimensions provide attribution information for event-scoped dimensions, including attribution information for the ad platforms you integrate with Google Analytics.
Read more here: https://support.google.com/analytics/answer/9355852