This is the 10346th most frequent German word.
prosieben
"ProSieben" is the name of a German television channel, not a standard German word.
Here, 'ProSieben' refers to a German television channel name where the news is being watched.
Ich sehe täglich Nachrichten auf ProSieben.
I watch news on ProSieben every day.
In this case, 'ProSieben' is used to refer to the broadcaster airing the mentioned series.
Die neue Serie auf ProSieben ist wirklich spannend.
The new series on ProSieben is really exciting.
'ProSieben' here indicates the broadcasting platform where the movie was shown.