The television industry’s Holy Grail—targeted advertising in which next-door neighbors could see different commercials during the same TV show—is expected to become a reality next year as a big wall to widespread implementation is about to come down.
Brands crave the ability to direct their TV ads to more specific audiences based on data much as they do when they work with tech giants such as Alphabet Inc.’s Google and Facebook Inc. Many advertisers see the decades-old model for ad sales that relies on wide targeting such…