This is the 4401st most frequent Polish word.
informacyjne
"Informacyjne" means "informational" in English.
Here, 'informacyjne' is an adjective modifying 'tablice', indicating that the boards provide information.
Tablice informacyjne znajdują się na każdym piętrze budynku.
Informational boards are located on each floor of the building.
In this sentence, 'informacyjne' describes 'dane' (data), emphasizing that these data are intended to inform or provide information.
Dane informacyjne powinny być podane zgodnie z regulacjami.
Informational data should be provided according to regulations.
'Informacyjne' modifies 'materiały' (materials), specifying that these materials are meant to inform or educate.