Linked from
The 17 pages that link to Earth's axial tilt, each with the reason it gives.
SeasonalityRelated: It drives seasonal differences in sunlight and temperature.
EquatorRelated: It shifts the Sun’s most direct rays north and south of the Equator over the year.
Southern HemisphereRelated: It makes the hemisphere's seasonal sunlight shift during Earth's orbit.
SolsticeRelated: This tilt shifts the Sun’s apparent path north and south through the year.
June solsticeRelated: This tilt directs the Northern Hemisphere toward the Sun at the June solstice.
March equinoxRelated: The tilt produces seasons as Earth orbits the Sun.
OrionRelated: It helps produce the seasonal night skies in which Orion is prominent.
TropicsRelated: Its 23.4-degree tilt sets the tropics’ approximate distance from the equator.
Winter solsticeRelated: The tilt points the winter hemisphere away from the Sun at the solstice.