How the ideas connect
A good science page should make the connection visible, not just list definitions.
Molecular geometry
Molecular geometry describes the three-dimensional arrangement of atoms. Electron-pair repulsions provide a remarkably useful first model for many main-group molecules.
Shape matters because it influences polarity, intermolecular interactions and ultimately many physical and chemical properties.
Molecular polarity
Bond polarity and molecular geometry work together to determine whether a molecule has a net electric dipole.
A molecule can contain polar bonds yet have little or no overall dipole when the bond dipoles cancel by symmetry.
Octet rule and its limits
The octet rule is a useful introductory pattern: many main-group atoms form arrangements associated with eight valence-shell electrons.
It is a guide, not a universal law. Electron-deficient species, odd-electron species and expanded-valence descriptions remind us where the shortcut stops working.
Resonance
A driven oscillator can respond very strongly when the driving frequency lies near one of its natural frequencies.
Resonance is not automatically destructive: the same physics appears in musical instruments, filters, sensors and countless engineered systems.
What to notice
A good science page should make the connection visible, not just list definitions.
Sources
IUPAC Gold Book · NIST · BIPM