KUnifiedPush provides push notifications for KDE applications. Push notifications are a mechanism to support applications that occasionally need to receive some kind of information from their server-side part, and where receiving in a timely manner matters. Chat applications or weather and emergency alerts would be examples for that. More technical details about KUnifiedPush are available on Volker's introduction post about KUnifiedPush.
This is a companion discussion topic for the original entry at https://blogs.kde.org/2024/10/19/kunifiedpush-1.0.0-is-out/