How does red shift relate to the universe?
Quasar is a point source of radiation, beyond Milky Way. Redshift is an effect of nature/s expansion of space, in between the Earth and a quasar..
(Quasi-stellar) quasar light is perhaps from the Black Hole of a far
distant galaxy, It is seemingly a point source of light.
Redshift happens when light ( or other electromagnetic radiation)
from a far distant object increases in wave length or shifted to the
red end of the spectrum. Redder means increased wave length..The
phenomenon is similar to what happens when the light source is
moved away from us.