The Universal Clipboard is a feature that allows users to copy content from one Apple device and paste it onto another. This functionality works seamlessly across devices like the iPhone, iPad, and Mac, provided they are signed into the same Apple ID and have Bluetooth and Wi-Fi enabled. To use the Universal Clipboard, simply copy text, images, or files on one device, then switch to another device and paste it. This feature enhances productivity by making it easier to transfer information without needing to use email or other file-sharing methods.