  Galactic outflows are ubiquitous in galaxies containing active star formation
or supermassive black hole activity. The presence of a large-scale outflow from
the center of our own Galaxy was confirmed after the discovery of two large
($\sim 8-10$ kpc) \gamma-ray bubbles using the \textit{Fermi-LAT} telescope.
These bubbles, known as the Fermi Bubbles, are highly symmetric about the
Galactic disk as well as around the Galactic rotation axis and appear to
emanate from the center of our Galaxy. The sharp edges of these bubbles suggest
that they are related to the Galactic outflow. These bubbles are surrounded by
two even bigger ($\sim 12-14$ kpc) X-ray structures, known as the eROSITA
bubbles. Together, they represent the characteristics of an outflow from the
Galaxy into the circumgalactic medium. Multi-wavelength observations such as in
radio, microwave, and UV toward the Fermi Bubbles have provided us with much
information in the last decade. However, the origin and the nature of these
bubbles remain elusive. In this review, I summarize the observations related to
the Fermi/eROSITA Bubbles at different scales and wavelengths, and give a brief
overview of our current understanding of them.
