Elon Musk is now in charge of Twitter, and his shake-up of the company is making advertisers nervous. All kinds of brands have started pausing their ad spending. WSJ’s Suzanne Vranica explains what Musk is doing to rein in the losses. Further Reading: -General Mills, Audi and Pfizer Join Growing List of Companies Pausing Twitter Ads -First Week of Elon Musk’s Twitter Was Chaos and Confusion for Employees Further Listening: -The Musk-Twitter Saga – From The Journal. Learn more about your ad choices. Visit megaphone.fm/adchoices