First, you must interrogate and understand how the demographic data was collected. This can provide limitations, nuance, and context which is important. For example, if it is inferred data, you may interpret your outcomes differently.
Then break apart your dataset into meaningful demographic clusters, i.e. 18-24. And analyze your data that way. How does each demographic differ from the rest? Are there trends or patterns.
Can you predict what a demographic will do? Are you beginning to establish norms?
How about the opposite, what isn’t shown in the data? What conclusions can’t you make from it? What isn’t being said.