Describes something as perceived by society at large, often in contrast to private or personal matters. Commonly used with nouns like 評価, 常識, 体面, 名声.
He cares too much about public reputation.
It's better to avoid behavior that deviates from social common sense.
社会的 is a broader term for 'social' in academic or systemic contexts, whereas 世間的 carries a nuance of everyday public opinion and conventional norms.
Derived from 世間 (せけん, 'society, the world') + the adjectival suffix 的 (てき).