Is Tails on a VM good?
Running Tails inside a virtual machine has various security implications. Depending on the host operating system and your security needs, running Tails in a virtual machine might be dangerous. Both the host operating system and the virtualization software are able to monitor what you are doing in Tails.
What is Tails OS used for?
Tails, or The Amnesic Incognito Live System, is a security-focused Debian-based Linux distribution aimed at preserving privacy and anonymity. It connects to the Internet exclusively through the anonymity network Tor.