This is the 741st most frequent Korean word.
전면
"전면" means "front," "entire surface," or "全面" as in "overall" or "complete."
'전면' here acts as an adjective, implying a thorough or overall review of something.
그 문제에 대한 전면 검토가 필요합니다.
A comprehensive review of the issue is necessary.
In this context, '전면' is used as an adjective meaning 'full-page', describing the type of advertisement.
새로운 전면 광고가 어제부터 시작되었습니다.
The new full-page advertisement started yesterday.
In this sentence, '전면적으로' is used as an adverb meaning 'completely' or 'entirely', describing how the policy was revised.