Arduino Bootloader Help

Hello,
Is is necessary to burn bootloader to my arduino Uno board. I just got it and its brand new. Whats the use of bootloader and which type of bootloader should I burn?
Thanks

yaantey:
Is is necessary to burn bootloader to my arduino Uno board. I just got it and its brand new.

No, the UNO comes with the bootloader already installed.

Whats the use of bootloader and which type of bootloader should I burn?

The bootloader allow you to load sketches into FLASH memory through the USB cable. For the Arduino UNO you would use the Arduino UNO bootloader.