The REM statemen
This is the most common way to write comments. Any line in your bat-file that starts with REM is completely ignored by the command-processor.
REM This bat-file moves all files in C:Incoming to C:ToProcess
REM Written by Nikunj Kansara
REM 05/01/2003
Double Colons
Alternatively you can replace the word REM by two colons. This style of comments is not very common, so I would suggest to stay clear from it.
:: This bat-file moves all files in C:Incoming to C:ToProcess
:: Written by Nikunj Kansara
:: 05/01/2003