Microsoft Purview Suite
Also known as Microsoft 365 E5 Compliance
Microsoft's bundled compliance add-on: advanced data loss prevention, insider risk, communication compliance, records management, and premium eDiscovery and audit.
Renamed from the E5 Compliance add-on, it now attaches to Business Premium as well as Enterprise plans. It is the licensing that unlocks the Purview capabilities most regulated businesses actually need.
Combined with Business Premium it is a notably cheaper route to near-E5 capability for organizations under 300 seats.
Where this comes up
Microsoft Purview Suite sits inside our microsoft 365 and cloud work. If you are trying to work out what this means for your own environment rather than in the abstract, that is the page worth reading next, and a short call will get you a straight answer faster than either.