Sometimes it's the two-liners that stick with people strongly enough to make them want to buy things.
Disclaimer: I haven't worked for Duolingo (I know this is getting repetitive but I don't want the legal smoke and Contra won't let me put a big sign anywhere to let me tell you that all the work on my page is speculative).
I made this billboard in response to a prompt created by Word Tonic: Gen-Z Writing Community. It involved designing a one-page ad targeting Gen-Z whilst drawing on Duo the Owl’s evil/passive aggressive persona.