A target rating point (TRP) (or television rating point for televisions) is a metric used in marketing and advertising to compare target audience impressions of a campaign or advertisement through a communication medium relative to the target audience population size. In the particular case of television, a device is attached to the TV set in a few thousand viewers' houses to measure impressions. These numbers are treated as a sample from the overall TV owners in different geographical and demographic sectors. Using a device, a special code is telecasted during the programme, which records the time and the programme that a viewer watches on a particular day. The average is taken for a 30-day period, which gives the viewership status for the particular channel. This has an average limit between 0-3.0. Target rating points construction Target rating points quantify the gross rated points achieved by an advertisement or campaign among targeted individuals within a larger population. For example, if an advertisement appears more than once, the entire gross audience, the TRP figure is the sum of each individual GRP, multiplied by the estimated target audience in the gross audiences. The TRP and GRP metrics are both critical components for determining the potential marketing reach of a particular advertisement. Outside of television, TRPs are calculated using the denominator as the total target audience, and the numerator as the total impressions delivered to this audience x 100. (As in 1,000,000 impressions among the target audience / 10,000,000 people in total in the target audience x 100 = 10 TRPs). TRPs are often added up by week, and presented in a flowchart so a marketer can see the amount of impressions delivered to the target audience from each media channel. TRPs can also be calculated as 100 x reach x frequency, where reach is the percent of the target audience with at least one impression and frequency is the average number of impressions. Calculating TRP In India, two electronic methods are there for calculating TRP: People meters device is installed in some places or set in selected homes to calculate the TRP. In this way some thousand viewers are surveyed in the form of justice and sampling. These gadgets record data about the channel or programme watched by the family members or selected people. Through this meter the information of TV channel or programme for one minute is carried out by the INTAM