what is TRP - Television rating point

this is a number that indicates the popularity of a television channel ( or programme) in a particular channel. On basis of this rating, advertisers choose which TV channels and programs to place their advertising in.

INTAM (Indian television audience measurement) is the only electronic rating agency functioning in India. INTAM uses two methodologies for calculating TRPs.
first is frequency monitoring.
second technique is Via picture-matching technique.