Yt.be/activate is a web page provided by YouTube that allows you to link your YouTube account to various devices such as smart TVs, streaming media players, and gaming consoles. It’s a crucial step to enable you to watch YouTube content on these devices. You need to use yt.be/activate when you want to access your YouTube account on a device other than your computer or mobile device. This is necessary to ensure that your account is securely linked to the device.