Various WAN lines can be controlled in an active / active configuration
Being able to virtually provide CPE on commodity HW
Being able to dynamically control traffic based on the policy of the application etc.
Visualization, prioritization, and steering (Internet breakout) are possible for individual apps for each security, corporate governance, and compliance.
Being able to configure a hybrid WAN with high availability and flexibility
Supports L2 / L3 that can be directly interconnected with switches and routers
Being able to report on the dashboard at the level of location, application, VPN quality, etc.
It has an open northbound API and can access and control the controller.
Supports zero-touch provisioning
Must have FIPS-140-2

How SD WAN works