How To: Safari for iPhone Lets Advertisers Track Your 'Clicks' — Here's How to Disable It
Apple wants to support the advertising economy, but its primary focus of late has been user privacy and security. In Safari, cross-site tracking, which lets content providers track you across websites and apps to show you more targeted ads, is disabled by default. However, content providers can get around that using less privacy-invasive ad measurements, but you can stop that too in iOS 14.5.