MAMP PRO is a configuration application that helps you set up and run the Apache or Nginx web servers and the MySQL 5.7 database server. It also takes care of the configuration of different versions of PHP. MAMP PRO also comes with a text editor, and built in functionality to move your site to a remote host provider.
Note: Unlike MAMP, the free version, MAMP PRO allows you to create many hosts. It is recommended to create a separate host for each website you create when using MAMP PRO. Do not create multiple document roots under the localhost document root folder.
More information on creating a new host can be found at here.