Facebook > Engagement by Age & Gender > Actions

What is an "Action"? 

An action is activity that happens on your ad (for example, someone watches your video ad) or as a result of your ad (for example, someone views your ad and then downloads an app).

Actions that occur on your ad may include link clicks, outbound clicks, post engagement, video views, and more.

Actions that happen as a result of your ad include website conversions, website leads, mobile app installs, mobile app purchases and offline conversions. Facebook attributes these actions to your ad if someone viewed or clicked on your ad within a certain period of time.