This is the 5316th most frequent Polish word.
seriale
"Seriale" in Polish means "TV series" or "shows."
Here, 'seriale' refers to television shows or series that are being watched.
Lubię oglądać seriale wieczorami.
I enjoy watching TV series in the evenings.
In this sentence, 'seriale' denotes the category of TV series generally, asking about those that are currently popular.
Jakie seriale są teraz popularne w Polsce?
What TV series are popular in Poland right now?
The word 'seriale' here is in plural form, signifying multiple television series.