FDisk command's ?

I plan on using Fdisk on my system. However, i've encountered an Fdisk command that i am unsure of. The command in question is, "Fdisk /mbr ". Now i know that Mbr stands for "master boot record" and that the command replaces the first, "446 of 512 bytes of information with zeroes, essentially rewriting the executable code and data strings that may currently be residing there. The remainder of the 512 bytes is the boot settings which tells the computer how to boot." That information i got from computerhope.com, however i am uncertain of it's meaning.
So, i would be most greatful if some kind wandering genius might enlighten me to what MBR means

Thanks
Whiplash

 

MBR

 

Hey thanks for the link. Now that i know what /MBR does i'm forced to wonder why one might want to do this? I'm assuming one would want to recreate the MBR if this was for instance where a virus could be, right?
My insatiable curiosity forced me to ask the question, even though i'm now pretty sure that i won't need to use that command.

Thanks
Whiplash

 

Yes, that is one use. Another would be if you had set up the computer for a dual boot, and do not want the dual boot anymore.
Also, if someone is using a drive overlay, this would kill it, perhaps ruining a hard drive boot up.