Continuous Server Task Node Example?

The Task node docs describe something called “continuous server”, but provides no examples. Does anyone have a practical demonstration of this?
From https://sdkdocs.roku.com/display/sdkdoc/Task :

A Task node observes its input **

Explanation:
https://forums.roku.com/viewtopic.php?f=34&t=98511&p=548600#p548600

ahhhh thanks! I failed at search, apparently.