tail is a unix/linux command that allows the last couple lines of a file to be printed into a shell window. This is useful for "tailing" logs - as the file is updated, each line shows up immediately on screen (or in a console) giving you a scroll of events.
node-red tail is a node that uses this functionality to send the output of the tail command as messages. Since windows doesn't have tail natively it won't be usable. I'm not 100%, but https://nodered.org/docs/getting-started/running makes mention of adding a tail.exe to windows, so this may be doable with some extra work.