This is the 16164th most frequent Russian word.
разъяснительную
"Explanatory" or "clarifying."
Here, 'разъяснительную' is used as an adjective describing the type of conversation, 'explanatory' or intended to clarify something.
Учитель провел разъяснительную беседу со студентами.
The teacher conducted an explanatory conversation with the students.
In this sentence, 'разъяснительную' describes a campaign aimed at explaining or clarifying environmental concerns.
Мы организовали разъяснительную кампанию по экологическим вопросам.
We organized an explanatory campaign on environmental issues.
In this usage, 'разъяснительную' modifies 'информация', implying that the information is meant to clarify or explain concepts to beginners.