What term is used to describe the information about who is watching a program?

The term that describes the information about who is watching a program is ratings. Ratings are a statistical measure that indicates the number of viewers or the percentage of the target audience that is watching a particular television program at a given time. This information is crucial for broadcasters and advertisers because it helps them understand the popularity of shows and the demographics of their audience, which in turn influences advertising decisions and programming strategies.

The other terms do not provide information specifically about viewership demographics. Sponsors refer to companies that provide funding for a program, shares indicate how many households are watching a program compared to the number of households watching television at that time, but they do not provide detailed audience information. Therefore, ratings are the most accurate term to describe viewership data.