Even more exciting, though, is the fact that Safari now also blocks auto-playing videos and uses machine learning to recognize and identify trackers. Safari then segregates and blocks these information gathering cross-site trackers so that now advertisers can't easily track you across sites you visit.
High Sierra's built-in Mail app uses less space for mail storage and Photos has received a major update that better utilizes various machine-learning techniques. These techniques recognize faces and improve sorting much more efficiently. High Sierra is also opening a Photo Book printing service, so third-party apps make ordering prints easier.