Composer Install Question

Hey everyone

So, I am trying to install Phpvms 7 and following the directions is confusing me. 

It says I need to install composer 

"git clone https://github.com/nabeelio/phpvms.git

cd phpvms

composer install "

I dont know what this is and where to put it. Any help would be appreciate it. Thank you. 

http://prntscr.com/pmhzhk

Composer is a PHP dependency management utility. https://getcomposer.org 

You have to run those on your server via SSH.