Hi, new to Apple, what benefits am I going to gain if I jailbreak my 4th gen iPad? And does it void my warranty? Thanks in advance.
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The definition of a jailbreak is the ability to run commands as root. If you're familiar with rooting on Android, it's a similar concept. You're allowed to run unsigned code crafted by developers/hackers to modify your iOS experience in the form of tweaks, or it can be used to patch vulnerabilities that Apple may not have patched yet and are crucial to your data security/personal safety. Most jailbreakers are every day users, who rely on downloading packages or tweaks developed by developers/hackers to have a more centralized way of modifying the iOS.
Pretty much any way of modifying iOS for productivity, accessibility, etc, you can find it in Cydia, which is analogous to a jailbroken AppStore as some tweaks/packages are paid though the majority are free. Which packages you find useful is dependent on what you're looking to change on your device. One example would be if you wanted to be able to move your cursor while typing without having to tap on the location that you want to edit. You can download a tweak called SwipeSelection, where you can swipe left and right on your keyboard to move the cursor left and right, much like the arrow keys on a computer, etc.
Since iOS is based off of Mac OS in a way, and Mac OS is based off of Linux, if you jailbreak a device, you're able to have actual control over the OS if you're familiar with Linux, so it's similar to having Linux/Ubuntu on a mobile phone or tablet with a predefined UI.