TRP stands for Tevevesion Rating Points. It is a tool that helps find out which television programmes are viewed the most. A device called the 'People's meter' is attached to the TV sets in a few thousand viewers houses for calculating this. These numbers are treated as the sample. The 'People's meter' actually records the time and the programme that a viewer watches on a particular day.
In India INTAM (Indian Television Audience Measurement) is the electronic rating agency which does this work. INTAM uses two methodologies for calculating TRP.