what is consular notified if applicable in h1b?

Could someone explain what is consular notified if applicable in h1b approval notice.

in my case it is given as consular notified (if applicable) : CHENNAI

does it mean i need to go to chennai for stamping?

You can go to any consulate in India for stamping. You are not restricted to go to just Chennai. That restriction was lifted up some years ago.