What is the difference between a VFR and IFR? 10 Points?

I am a beginner student pilot and a big time FSX player, but when i fly using a flight planner I fly IFR. Not sure why ive just always liked it better.
In laments terms please what is the main difference between a VFR and IFR. A easy description and a website source will have a greater chance at best answer.
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