The Put Call Ratio (PCR) is the Put Open Interest divided by the Call Open Interest. PCR > 1, means more puts outstanding than calls, and vice versa.
Its normally taken as a contrarian indicator coz option selling is normally done by Institutions/ professionals, since option sellers have unlimited liability. Studies have also shown that more than 60% of all options expire unexercised.
More puts being sold means the market/ stock should move up, more calls being sold means upward movement will be sluggish.
In India, domestic institutions are not too well versed with the usage of options, and prefer having a limited liability, so they are options buyers. FIIs too buy options to take advantage of glaring mispricings, I presume!!