This new iOS 14 feature gives your iPhone a different MAC address every time it connects, making it much more difficult for this sort of tracking to work. It's set to be enabled by default for every new network you connect to.
Know When Apps Snoop on Your Clipboard
If you see a message about apps pasting clipboard information from other apps at the top of your iPhone screen, don't panic: That's just the new clipboard notification feature in iOS kicking into action. As the iOS 14 beta program revealed, plenty more apps monitor the clipboard than you would actually think, even before you've actually pasted anything.
Most apps now seem to have tidied up their approach to clipboard access to avoid getting called out. If you're using iOS 14, you should only see the notification when you actually choose to paste something inside an app, in which case the app obviously needs access to the clipboard.
Limit How Apps Track You
Another change in iOS 14 is that apps will have to specifically request permission to track you across other apps and sites. However, after complaints from advertisers—most notably Facebook, which in August said the move would "severely impact" its lucrative Audience Network—this feature won't be fully enforced until sometime next year.
For now, you can head to Privacy then Tracking from the iOS Settings menu, and you'll find a toggle switch for whether you want apps to be able to request perm ..