Was ist der Post-Typ „small action"?

[Canapin (Coin-coin le Canapin)]

Hi.
There are several post types: regular, moderator_action, small_action, and whisper.

What is the small_action post type?

[dax (Daniela)]

These are all small_action:

[awesomerobot (Kris)]

Es gibt noch zwei weitere