What feature would you use to report the name of the author on each article page on a blog managed in Google Analytics?

Using a custom dimension is the appropriate approach to report the name of the author on each article page of a blog. Custom dimensions allow you to track additional data points that are not automatically collected by Google Analytics. By setting up a custom dimension specifically for the author's name, you can associate this information with the relevant pages and analyze it in your reports.

This capability enables more granular reporting and better insights into content performance, as you can filter or segment your analytics data based on different authors. For instance, you could see which author’s articles generate more traffic or engagement, providing valuable information for content strategy.

Other options do not serve this specific purpose as effectively. Event tracking is more suitable for reporting interactions or actions taken by users on your site, like clicks or form submissions. Content grouping helps organize pages for reporting, but it doesn't capture specific additional attributes like the author's name. User properties are used to define attributes of users, such as demographics or user segments, but they aren't designed for page-level attributes like author names. Thus, employing a custom dimension is the most effective method for capturing and reporting author information associated with blog articles.