Before I buy it, I have a question, is it possible that "slave websites" will be related to one of the "master website" categories and to its database? What I mean is that "slave sites" for example: a job search site, a car sales site, a real estate site, etc. And they are all connected to the database of the "master site" with the category of the subject of which the "slave site" is associated, and thus you can manage all these sites from one point. Did I understand one of the essences of the plugin correctly?

No, plugin helps to manage multiple sites,  but is not interconnecting data between sites

Understood, thank you.