What do I need to install to run Drush make? I want to make a site using a drush make command.I have already Drush installed on my server.
When I try to run this command: drush make --prepare-install martplug-build.make mart plug I receive this message: The drush command 'make martplug-build.make martplug' could not be found.

Should I also install Drush Make? If so how to do this?
Did you have a look at the INSTALL.txt file. The easiest is to put it inside .drush folder