But what exactly can I do with it? I really just want the basic Apollo IM, or iphysics, maybe some small simple programs. I wont be playing NES on it or anything.
Feel free to uninstall it, but you may have to install it again if you want to do anything beyond what installer offers. You dont do anything with it per se, but you need it if you want to manually transfer anything to your phone. For example, you have a theme going but its missing an icon. You found a different icon that you would like for that theme. SSH, while not being an application, allows you to sFTP the icon file to your phone.