Gaining root access to your android device can give you multiple benifits including installing custom ROMs and running apps that require root access.
I am using my Samsung Galaxy S3 GT-I9300 and the downloads below are for rooting the Galaxy S3. If you are using a different phone you may need different software but this should work for most, just Google your phone model first to see if compatible.
Follow this simple lesson to gain root access on your android and root your android phone for free.
Odin Download