In order to keep up with his competition, Conan had to think of a segment that involved him driving with his guests. However, they couldn't sing because that would ripoff James Corden's wildly successful 'Carpool Karaoke'. They really couldn't drive around and tell jokes because that would ripoff Jerry Seinfeld's 'Coffee with Comedian's'.
His solution, just drive around. Literally. It does create some entertaining moments but also some awkward ones as well!
I think it's a clever little bit!