  This paper reviews our current understanding of low-luminosity AGNs (LLAGNs)
in the context of the advection-dominated accretion flow. The best investigated
source, the supermassive black hole in our galactic center, Sgr A*, is
emphasized since the physics of accretion should be the same for various LLAGNs
except for their different accretion rates. The important role of jets is
discussed, but this is less well established.
