Where drush make downloading my projects? I have created a drush make file through drushmake.me

Which is, I've created a file my.make in public_html folder and run the following command:

drush make my.make


It shows all the files downloading ok, but when I am checking my public_html folder it's showing nothing in my public_html.

I don't understand where all the projects are downloaded. 

Any idea?
Normally drush makes default behaviour is to create the site in the current directory - relative to where you run the command.

But the simplest way to deal with this is just to run drush-make with a parameter explicitly stating where to deploy the site:

drush make my.make relative/path/to/my/public_html


or

drush make my.make /absolute/path/to/my/public_html


Obviously replacing the path in question with the appropriate one. Don't understand UNIX file paths? Read up on them on wiki page.

And while I am at it, why don't you take a look at the drush make documentation too.

There are a number of drush configuration files that affect the working directory for drush commands - the most likely candidate being a drushrc file is example.drushrc.php.