Virtual Report Suites also can be used for more than just "security" reasons, for organizations using a "global report suite" to track multiple websites, the Virtual Report Suites can be used to break this global suite into individual sites, or groups of sites that fall under a regional department, etc.
This means that your users can either see the network as a whole, or get right into a sub-section of the content (i.e. Site A) without needing to spend time pulling in all the segments each time they want to report on it.... it's like a "quick filter" based on commonly used parts of your data.
- Individual Sites
- Groups of Sites that fall under regional groupings
- Platform (i.e Website vs App)
- Type of Content (i.e. group all content from all sites based on sections of the site - like "classifieds" for a news company - to support the division that deals exclusively with that content)
There are many ways to use virtual suites, even beyond what @jeff_bloomer and I have mentioned.
But the bottom line is, the Virtual Suites use a segment or multiple segments on a "parent" suite...
If you were to create a Workspace and apply a segment, and create a virtual report suite and apply that same segment, the data returned by both sets would be identical (unless of course, like in Jeff's case, you customize which dimensions and metrics are available within the suite)