the.com/hooks
The curved part of anything designed to catch and not let go.
means Curved or bent objects, or by extension catchy bits and clever tricks, that grab and hold something.
from From Old English hoc, kin to Germanic words for bent things; the same root that snags fish, coats, and pop choruses alike.
Pop musicThe hook is the part you can't unhear.
BoxingA sideways punch curving toward the jaw.
ProgrammingCode that hijacks behavior at a chosen moment.
PhraseOff the hook means freed from obligation.