Pong allows you to create pings by the simple press of a button. Pings can be used, to communicate with other players. For example while exploring it makes it easier to communicate directions, or hint at interesting structures in the distance. It is required to install the mod on the server you want to use it on.
As to not get overwhelmed by information, pings disappear after around 7 seconds.
Controls
- Create Ping: Left Alt
Controls can be changed in the usual keybindings menu under the section "Pong".