I think by "various representations of familiar experiences" they are talking about how the text shows events and/or feelings that are common to all people in general eg. the common experience (for lack of better wording) of feeling happy that you did well in something, or the feeling of loss when someone dies etc.
How the text shows these things, across so many differences in culture/socioeconomic status/age etc. is what you're meant to discuss, imo.