I would say the main benefit you will find with SNMP monitoring is if you are already using an external tool for monitoring all your other network devices. For example, if you have Meraki, Cisco IOS, and some other non-Cisco vendors, you could in theory monitor all of them from a single monitoring system using SNMP.
In a previous job, we used something like PRTG with SNMP to create a single screen to watch all the network devices across multiple vendors. If something popped up red, we immediately knew if it was Meraki and could then jump onto the Meraki dashboard for more detailed diagnostics.
In short, if you have a Meraki-only environment, enabling SNMP isn't necessary (though it could be a nice lab if you want to learn more about the protocol). If you are using multiple vendors in your network and want to create a single source of monitoring , SNMP will help to enable that.
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