This is the 165th most frequent Korean word.
사회적
"Social."
Here, "사회적" characterizes "약자" (vulnerable individuals), denoting their vulnerability within a social context.
사회적 약자를 보호하는 것은 중요합니다.
It is important to protect socially vulnerable individuals.
Here, "사회적" (social) qualifies "거리" (distance), implying it pertains to communal or public interactions.
사회적 거리는 바이러스 감염을 예방합니다.
Maintaining social distance prevents virus spread.
In this context, "사회적" is an adjective describing "문제" (issues), suggesting these are issues concerning society.