I heard that on occasion bios updates can lead to faster boot-up times, etc.
They can also cause you to have problems you never had before.
BIOS updates can help if the update was written to fix a specific hardware problem you are having.
But other than that, BIOS updates, the best advice out there is honestly this:""If it ain't broke, don't fix it"
If you do something wrong during the update, you will be left with a dead motherboard. The only way to fix it then is to buy a new BIOS chip from your board manufacturer, or send the board back them if the chip is not removable have them restore the BIOS for you.
But if you do have a problem or just want to do it to see how it works, the worst you might have to do is flash back to the version you have now, if you do the flash correctly.
Since you apparently did not take the time to read the update instructions online at your manufactures web site where you got the update, or read your manual, I certainly wouldn't attempt it myself at this point. Enlist the help of a friend who knows what they are doing.