Hi,
++ The management access rules are used to permit/deny to-the-box traffic. So if in case you want to block or allow certain users for management access of the box, you can create a rule in this section
++ In your case you have listed the device for management access so there is no need to configure any management access rule
++ Under Device Management --> ICMP, you can control ICMP traffic that terminates on the ASA interface. However, if no ICMP control list is configured, the by default ASA allows to-the-box icmp traffic.
Regards,
Tavleen