cp [OPTION]... SOURCE DEST
The cp command is used to copy a file from one location to another, for example:
cp afile.txt home
the above command copies a file called afile.txt to the home directory. This command (like most others) can be used with the '*' wild card which means all. For example:
cp *.txt home
this command will copy all files with a .txt file extension to the home directory.
This is pretty much all you needs to know about this command, you can find out more by typing 'man cp' into your terminal.