Path to domains main folder.

If you are using classical Linux hosting access to your main folder will look like this - /var/www/vhosts/vashdomen.lv/httpdocs

Every hosting account has a main domain (mainly it's the domain name you wrote while you were ordering hosting, or the domain you can't delete, because main domain can not be deleted in Plesk), according to this if your domain name is domain1.lv, than address is /var/www/vhosts/domain1.lv/httpdocs

If you have second domain named domens2.com, a the folder is /newdomain2, than the address will be /var/www/vhosts/domain1.lv/newdomain2