FastScan is a feature that allows you to quickly and efficiently explore the available TV channels on your set-top box or TV. This feature works by automatically searching and finding available channels and their relevant information such as channel names and programme guide. FastScan greatly simplifies the process of tuning in to your TV device, which is especially useful when you are setting up your TV for the first time or changing TV providers. This feature also ensures that your channels are automatically updated to keep you up-to-date with the latest content and broadcast information. FastScan is a useful tool for getting quick and easy access to all available TV channels.