Every domain in Plesk created with website hosting has its own directory created on the server's file system. By default the path to the directory is as follows:
This folder contains the document root directory, that is, the folder where all the domain's web content is stored. By default it is the
httpdocs folder, but it can be changed in Plesk.
To change the document root directory, go to Websites & Domains> Hosting Settings and change the directory name in the Document root field.