Linked from
The 10 pages that link to Transverse wave, each with the reason it gives.
PolarizationNarrower topic: Polarization describes the orientation of these transverse oscillations.
AmplitudeRelated: Its displacement from equilibrium is often drawn directly as wave amplitude.
Wave theory of lightNarrower topic: Light’s transverse character accounts for polarization.
Mechanical waveBroader topic: This is another basic mode, supported by shear resistance in solids.