For the music industry, the rollout of a new Taylor Swift album is always a master class in marketing, and the release of "Look What You Made Me Do," the first single, is a case in point.
In the three years since Ms. Swift's last album, the music industry has changed so drastically that much of the old playbook no longer applies.Ms. Swift, 27, can turn any release into a pop-culture phenomenon and a referendum on the state of the business. But what counts as a hit when all the traditional goal posts keep moving?