Why Meteors leave short-lived ionized trails high in the E region that can reflect radio signals for a fraction of a second up to a few seconds. The lower the frequency, the weaker the ionization needed to reflect it, so the lowest VHF band with an open, quiet noise floor works best. That makes the 50 MHz band the standard choice for meteor scatter contacts out to roughly 1000-1300 miles.
Watch out The 144 MHz band does support meteor scatter and is used for it, but bursts there are shorter and weaker than at 50 MHz; the UHF bands at 70 cm and 33 cm are far too high for meteor trail ionization to be useful.
Meteor scatter = the Magic Band, 6 meters. Lower frequency, easier reflection off a thin ion trail.