**Like you’re five:**
Imagine you and your friend are playing a game. You’re wearing a blindfold, and he’s trying to get you to a goal post that is diagonal from you. The catch is, he can only give you two-word instructions like “go left” or “go forward”. You will reach the goal, but you can’t go straight there’s
Now let him use 4 words instead of 2. “Go forward and left”. You will know to travel diagonally to the goal.
That’s basically the difference. More information in a single instruction means things go faster.
**Like you’re older than 5:**
At the core of your computer is a processor. That processor is being constantly fed a set of instructions. It takes those instructions and tells the rest of the computer what to do.
A bit has two possible values, 1 or 0. A 32 bit operating system means the processor can process 32 bit instructions, same goes for 64 bit instructions. This means your computer can do much more with a single instruction, so everything happens faster.
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