I have to carry out a procedure for the management of information by a group of users. Later I could have the same need but for a group of different users. Since I haven't understood how the multisite works, I can't make up my mind.
The software will be the same, but for database copy, user management and security issues, I would prefer to have the database different for the group of users.
Can the multisite manage multiple databases with a single software?
Do I have to foresee it and create it from the beginning or can I create the software and subsequently, if there is a request, transforming it into a multisite?