The lesson
Give a sales deck a single claim about the buyer's audience on its own slide, set so large there is nothing else to read.
A dark slide with white sans-serif text: "Snapchat is the best way to reach 13 to 34 year-olds." The "13 to 34" is underlined in yellow, and the Snapchat ghost sits in the bottom right corner. There is no image, chart or logo wordmark on the slide.
Don't claim "the best way" unless the following slides back it. Keep one claim per slide and one underlined phrase.