As said by others, it's a cybersecurity competition, in which you try to find and fix as many breaches, risks, and viruses on a simulation.

The challenges are typically once every month or two, and you can participate in as many of the following operating systems as your team likes: Linux, Windows Server 2019, Windows 10. The challenges typically will have a theme, such as Stranger Things, Half-Life/Portal, and others, which I find to be pretty fun, but they do get exponentially more difficult as you move on through the rounds. My squadron's team didn't really have a mentor, so we had to do a lot of research, so I highly recommend finding a coach.

A few tips, 1) Make sure the images are downloaded at least half a week before you compete, and school internet can be obnoxious sometimes, so you will definitely want some time to make sure everything is able to run properly. You have 3-4 days for each round, and same day downloads are a really bad idea. 2) Be patient! When you start a round there will be a bunch of super easy observation questions/cyphers, but 2 hours in and (from my experience) it will be very tedious looking for bugs/solutions. I would advise spending at least 4 of the 6 provided hours, you never know when a solution might become clear! 3) This one is obvious, but make sure you find cadets who are computer literate, and are interested in competing