This is the 8898th most frequent German word.
landesweit
Nationwide.
Here, 'landesweit' is used as an adverb meaning 'nationwide,' describing the scale at which the protests have spread.
Die Proteste haben sich landesweit ausgeweitet.
The protests have expanded nationwide.
In this sentence, 'landesweite' is used as an adjective modifying 'Umfrage' (survey), indicating that the survey covers the entire country.
Eine landesweite Umfrage wurde durchgeführt.
A nationwide survey was conducted.
The word 'landesweit' functions as an adverb to describe the scope of the broadcaster's reporting efforts.