Noted, and disagreed.
Since it specifically describes the function of non-privileged mode (denoted by "$") and privileged/root mode (denoted by "#") I believe that the tutorial is sufficiently descriptive with regard to Linux prompts.
It does require the individual on the other end to take the time to interpret and understand, as hacking Synology is an inherently technically advanced activity. As is typical, those who are inclined do in fact figure things out over time, which you were able to do. So all is well.