Hi! Welcome to the Insider Advertising daily for November 19. I’m Lauren Johnson, a senior advertising reporter at Business Insider. Subscribe here to get this newsletter in your inbox every weekday. Send me feedback or tips at LJohnson@businessinsider.com. Today’s news: The firms behind the in-house marketing boom, Edelman’s push to rival ad agencies, and YouTube’s pitch for audio ads. Stiglin Consulting Meet 20 firms helping big brands like Sprint and Unilever take their advertising in-houseTanya Dua looked at the firms behind the rise of in-house marketing — a trend that has grown during the pandemic.Consultancies and firms have helped marketers make