Comments are used to insure that you and other programmers understand what goes on in every part of the code. They are remarks you write as you program, which is ignored in the compilation process. As with many LISPs, a comment in Sababa starts with a semi-colon.
An example of a comment is:
sababa> ;I can write what ever I want and it will be ignored
=> ()
sababa> ;So what do you guys think of Sababa so far?
=> ()