What I found valuable in Cisco DNA Center is the Software-Defined Access Network, so the entire LAN network can be centralized and managed from a single dashboard.
Cisco DNA Center is suitable for centralized management and lets you deploy switches in a centralized fashion. You can also do multiple switch port configurations simultaneously and segregate your traffic into multiple fabrics.
Another valuable feature of Cisco DNA Center is enhanced security through Scalable Group Tags. Cisco DNA Center can be integrated with your Cisco ISE to enhance the port securities, and this paves the way for Software-Defined Networking in the LAN segment, which is the main advantage of Cisco DNA Center.
I also like that you can use Cisco DNA Center for data assurance or correlation. The solution shows your network and client health parameters, which I find convenient for troubleshooting.