What is online tracking? Online advertising is big business. According to industry groups, revenues for online ads exceeded $150 billion USD in 2021 and continue to grow every year. Those ads are powered by online tracking, profiling, and targeting: a vast corporate surveillance network that harvests and analyzes our every click, query, and more. The average web page shares data with dozens of third parties. The average mobile app does the same, and many apps collect highly sensitive informat...
