The radio advertisement introduces an upcoming documentary called "Café Nation" that will air on Channel 4. It poses a variety of questions to pique the listener's interest in learning more about coffee, including where it comes from, why it is so popular, and its effects on the body. The advertisement provides some brief context that coffee is the second most popular drink globally and that Brits drink 70 million cups per day. It encourages listeners to watch the documentary to seek answers to the questions posed.