Pinterest ads are now more on point. The social network has started letting brands target audiences, and it has a new kind of Promoted Pin—one that's animated. The ad updates come more than a year after Pinterest first started selling Promoted Pins, and the changes are a big step for its ad technology. Brands will be able to target about a dozen audience types from foodies to gardening enthusiasts to millennials. The new animated ads are called Cinematic Pins, and they are a bit different from the moving ads developed by rivals like Facebook and Twitter. On those platforms, videos s...