Should I jail break my iPhone 4?

So I have a white iPhone 4 I got a couple weeks ago all my friends have iPhones and most of them have all did it. How do I jail break my phone and is it safe for my phone
And what exactly is it?

Jailbreak is a sort of cracking your iPhone's iOS by a method after which, you may be able to use illegally cracked free apps but, many times, your phone may be got caught when connected to iTunes. But, it is safe if you want to use free apps.

But, its a very risky job. You should probably go to your friend who has successfully made his/her own jail-broke.

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