A method for measuring the audience for television se basa en el audímetro, this is a device that allows the behavior of television households. Store all information relating to what you see on the screen and then sends it to the plant where it is processed and ordered all the information on screen quotas, scheduling more followed, timetables that most viewers records, and so on.

The audímetros are installed in about 3,100 homes and shared proportionately by all Spanish provinces, so that is governed by the principle of representativeness. Once you receive the data collected at the plant are classified according to various aspects. It generates a database of individuals that shows how many times they see on television, what channel, what content, starting and ending time, the level of zapping is done and the day.

Currently, this until April 2008, the most watched hearings under control among the channels that broadcast in Spain is the series production of Aida offered by Spanish Telecinco. It follows the Champions League Football issued by Antena 3 and thirdly the Uefa Cup also broadcast by the same channel. The sporting events in Spain collect large percentages of shares or share screen, soccer and Formula 1, are the most followed.