Tails OS is an operating system that runs from a USB stick, leaving zero trace on the computer.To create a Tails bootable USB, you need an 8GB USB drive, internet connection, and a computer.The installation process involves downloading Tails OS image, verifying the download, and using Balena Etcher to write the image to the USB drive.After installing Tails OS, boot from the USB drive, select language and keyboard layout, and set up persistent storage.Tails routes internet traffic through the Tor network, providing anonymity and security online.Key features of Tails include Tor Browser, encrypted messaging with Pidgin, email with Thunderbird, and KeePassXC password manager.Tails also includes tools like OnionShare for secure file sharing, metadata cleaner, encryption tools, and memory wiping on shutdown.Best practices with Tails include keeping it updated, using strong passwords, and being cautious with personal information online.Limitations of Tails include performance issues running from a USB drive and websites blocking Tor connections.Tails is not suitable for high-performance computing, gaming, or day-to-day tasks where privacy is not a concern.