Here is a list of all related documentation pages:

VST 3 Locations / Format	Formats definition of a VST 3 Plug-in and its preset and where they are located on different platforms
Note Expression Support	A new way to control / modify / change a specific played note during the playback
Key Switch Support	Allows information exchange between the Plug-in and Host about which key switches are currently used
Parameters and Automation	All parameter changes of a processing block.
Units	A logical section of the Plug-in
Presets & Program Lists	See Preset Format for Preset format definition
Complex Plug-in Structures / Multi-timbral Instruments
Remote Representation of Parameters Support	Extended Plug-in interface IEditController for a component.
Context Menu Support	Extended Host callback interface IComponentHandler3 for an edit controller.
Channel Context Info Support	Channel Context Interface.
Prefetchable Support	Indicates that the Plug-in could or not support Prefetch (dynamically).
Request Bus Activation	Extended Host callback interface IComponentHandlerBusActivation for an edit controller.
NoteExpression Physical UI Mapping Support	Extended Plug-in interface IEditController for note expression event support.
How to use cmake for Building VST 3 Plug-ins	The SDK provides a set of cmake files allowing you to compile the included samples and to develop new Plug-ins
How to add/create your own VST 3 Plug-ins	The SDK provides a HelloWorld example, you can start from this example to create a new VST 3 Plug-in:
Setup Linux for building VST 3 Plug-ins	In order to build the SDK successfully you need an Ubuntu based Linux distribution
VST 3 Workflow Diagrams	Some useful graphical Call Sequences