How to find Manage Web Applications and install Web Applications in plesk?
Login into Plesk panel.
Click the Applications tab.
Featured Applications shows the most recommended and popular apps available for your website.
click All Available Applications.
This section shows all the applications, both free and commercial, that are available to be installed.
Selecting a category will narrow your search... and you can also choose a sub-category.
Let's go through an example of installing an app.
To install an application, go to Install or Install (Custom) or Install Version.
In the Manage My Applications section, we can see which applications we've installed, and it's from here that we can go to manage our installed applications.