Super massive black holes (SMBHs) seem to be the galaxies' beating hearts. 
While many observational discoveries support a close link between SMBH 
activity and the assembly of the host galaxy, the physical processes behind 
this interplay remain unclear. One of the most efficient way to constrain the 
physical models of AGN/galaxy co-evolution is to study the effect of accreting 
SMBHs in the galaxies that host them. 
I will talk about recent results on AGN/galaxy coevolution both looking 
at the statistical properties of the AGN host galaxies and studying in 
detail specific objects.