Jailbreak ¿Pros & Cons?

Ever since I have an iPhone I've heard about "Jailbreak", however I haven't tried it since I don't know anybody who's used it before so I want to know if any of you have used it, what's different with or without it? If you install it and you don't like it, can you uninstall it? Would it damage your phone if you do so? Etc

Enlighten me, girls!

How should I know

You've been such a great help.

kdllc;vdvd

The only reason I haven't gotten my iPhone jail broken yet is because it voids the warranty but I have seen phones that are jail broken and they can do "cool" things that the normal Iphone can't so I'd say go for it and do it if you are near the end of a contract and nothing is wrong with your phone that needs to be fixed

It can be quite dodgy as you don't know what is actually in the software and it can make your phone prone to getting malware etc

This damn gif though.

So I don't know about for phones, but I've done it on other things before. It was awesome and defiantly worth it.