[makomk]

Auditing of TV and newspaper ads is done largely on the receiving side, not the sending side - companies monitor what's actually shown in the stations broadcast and papers sent to real people, they pay people to install monitoring devices to see what they watch, and they contact people to find out what they're reading. The internet equivalent isn't really possible on iOS without doing some kind of Facebook-esque end-run around Apple's walled garden and paying people to install non-Apple-approved monitoring apps - and even that would probably only work for really massive, broad advertising campaigns.

[blowfish721]

I don't know about the US but at least here in northern Europe on the broadcasting side this used to be true. Now the monitoring of what people are watching is done through the setup boxes as well as the web streams. When it comes to what commercials being broadcast it's usually done through logging in the software that handles the playlist (for linear tv) and then reported back to the advertisers. The advertisers probably have different systems in place to verify it as well however.