This is the 16010th most frequent Russian word.
публичное
"Public" or "open to the public."
Here, 'публичное' is used as an adjective referring to a speech's characteristic of being open to the public.
Это было публичное выступление.
It was a public speech.
In this sentence, 'публичное' describes 'мнение' (opinion), indicating it pertains to the general public.
Публичное мнение часто влияет на решения правительства.
Public opinion often influences government decisions.
Here, 'публичное' is utilized to describe 'поведение' (behavior), denoting its nature as it occurs in view of others.