I'm sure some people were confused over this feature.

How does this work exactly? Well, most professional players in TF2 do "c tap" rocket jumps which gives them more height and what not... This feature will automatically do the shooting, the aiming and the crouching all for you! Hence the name "auto rocket jumper".
https://puu.sh/DtUzV.pngI highly recommend you bind a hotkey to it otherwise every time you press your jump key it will perform a "rocket jump".
If your health is too low it will not perform an auto rocket jump so no need to fear in accidentally killing yourself.

It also supports certain flare guns for the pyro. :)