Currently, we are not measuring the clicks on any of the actions on the article screen. Ex: Save, share, new tab, etc. This could be very valuable data that can be collected with minimal effort.

Tech details:

android_article_toolbar_interaction will have similar menu items, the main difference is no Watchlist menu item in Article Menu. Each item could be an event.action with corresponding data sent in row for each click event, event.action names would be formatted as follows:

Save = save
Language = language
Find in article find_in_article
Theme = theme
Contents = contents
More = more [We don’t need to track this as any of the below clicks imply More was clicked, but maybe we should track because it will give us a separate count of all More clicks]
Always at Top: Customize Toolbar = customize_toolbar
Share = share
Talk page talk_page
Edit history edit_history
New tab = new_tab
Explore = explore

Thank you @SNowick_WMF for creating the above technical specs.