What does the cosmological interpretation of redshift imply about the expansion of the universe?

The space between the galaxies is expanding.

Although the initial observation of redshift could be explained by the classical Doppler effect, suggesting galaxies were moving apart from a central point, the cosmological interpretation suggested by the data is more complex and fundamental. This cosmological view dictates that it is not simply objects moving through static space, but rather the fabric of space itself that is stretching between the galaxies. As light travels across this expanding intervening space, its wavelength is physically elongated, causing the shift toward the red end of the spectrum. This mechanism resolves the issue of a privileged center, as the expansion of space ensures that any observer in any galaxy would see all other galaxies receding proportionally.