What was the immediate cosmological implication of Hubble's distance measurement for the Andromeda Nebula (M31)?

Answer

It established Andromeda as a massive, independent galaxy located far outside the Milky Way.

By calculating Andromeda's distance using Cepheids, Hubble demonstrated it was an extragalactic system, instantly increasing the known scale of the cosmos.

What was the immediate cosmological implication of Hubble's distance measurement for the Andromeda Nebula (M31)?
discoverygalaxyAstronomeruniverseLaw