This is the 275th most frequent Italian word.
pubblica
"Pubblica" means "public" in English.
Here, 'pubblica' is used as an adjective to describe 'biblioteca' (library), indicating that it is accessible to the general public.
La biblioteca pubblica offre molti libri gratuiti.
The public library offers many free books.
In this sentence, 'pubblica' functions as a verb, the third-person singular of 'pubblicare,' meaning 'to publish' something.
L'autore pubblica un nuovo libro ogni anno.
The author publishes a new book every year.
Here, 'pubblica' again acts as an adjective, modifying 'decisione' (decision) to indicate its accessibility or openness to the public.