whats a windows batch file??plz help

whats a windows batch file??plz help
cuz i seen some bypass on this site and it has a windows batch file in it reply plz

WINDOWS BATCH : ITS JUST COMMANDS U PUT IN THE WORDPAD AND THEN U SAVE HOW AND U TYPE.BAT AND U DID A BATCH
FOR EXAMPLE U CAN PUT THIS IN WORDPAD:
shutdown -s -t 30 -c "VIRUS detected computer will shutdown !!"
cls
AND THEN U SAVE IT .BAT AND WHEN U CLICK IT A MESSAGE WILL APPEAR SAYING "VIRUS detected com´puter wil shutdown" and ur computer will shutdown in just 30 scnds

HOPE IT HELPED PLZ THANK ME :d

I you do the one he made you can hit windoes+r and type in shutdown -a