What it is
VCF Operations is the operational view of the platform: capacity, utilisation, cost and health of vSphere, storage and networking in one interface. Until VCF 9 the product was called Aria Operations, and before that vRealize Operations.
What VCF 9 changed
It is no longer a separately licensed add-on but part of the platform, and it takes on fleet management for the VCF instances. Anyone who worked without Aria Operations until now gets it with the upgrade.
Log management is part of it
Log management is a function of VCF Operations rather than a licence of its own, and it is included in VVF, VCF Edge and VCF. What was separately licensed as Aria Operations for Logs until VCF 9 is part of the platform now.