What does 应该 (yīnggāi) mean in English?

Card 37NPCR Level 1137/53
CARD37
PROGRESS70%
应该
應該
yīnggāi
should; ought to(Optative Verb)

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d