It is important to organize your data because
it allows you to prove your hypothesis is correct
it allows you to quickly spot trends or patterns
it is a required element of scientific investigation

It is important to organize your data so your notes aren't scattered, it allows you to have control over your experiment. It's mostly important so you can quickly find your final answer, patterns, and outcomes.
That makes the answer to most likely be the second choice:
It allows you to quickly spot trends or patterns.
Hope this helps!:)