  This is a brief review of our understanding of the properties of the
interstellar medium (ISM) in dwarf galaxies in connection to their star
formation activity. What are the dominant phases of the ISM in these objects?
How do the properties of these phases depend on the galaxy properties? What do
we know about their cold gas content and its link to star formation activity?
Does star formation proceed differently in these galaxies? How does star
formation feedback operate in dwarf galaxies? The availability of observations
from space-based facilities such as FUSE, Spitzer, Herschel, and Fermi, as well
as observatories such as SOFIA and ALMA, is allowing us to make significant
strides in our understanding of these questions.
