This is the 955th most frequent Polish word.
prasowy
"Prasowy" means "press-related" or "pertaining to the press."
Here, 'prasowy' is used as an adjective meaning 'related to the press', describing the type of the article.
Dziennikarz napisał świetny artykuł prasowy.
The journalist wrote an excellent press article.
Here, 'prasowe' refers to something published or related to the press material, in this case, a particular edition.
W archiwum znaleziono stare wydanie prasowe.
An old press edition was found in the archive.
In this sentence, 'prasowa' modifies 'konferencja', indicating that the conference was organized by or for the press.