The Back Tap feature introduced in iOS 14 allows users to quickly access various functions by double or triple tapping the back of their iPhone. While it enhances the device's capabilities, it can also trigger unintended screenshots. Although you can't turn off screenshots entirely on an iPhone, you can disable or customize the Back Tap feature. To do so, go to Settings > Accessibility > Touch > Back Tap and choose 'None' as the setting or select a different function for double or triple tapping.