Advertisements on Mumbai Local trains have become very common nowadays.
Ads like this one 'A TV soap about shaadi- marriage, sasural - home after marriage, usually a joint family, sasumaa -mom in law' are best advertised on ladies compartements, and increase the TRP of TV soaps. As soon as women passengers see a train like this, they begin to discuss the storyline and lo --the soap is soon popular.
This one 'Mera Sasural' is on all the compartments of the train.