@Simo-s_h is right, you can use Meraki Systems Manager as a standalone solution without any other Meraki products.
When you have a Meraki switch or Access Point and click on a client, and if the client has Systems manager on it, then you get some extra info from the switch view.
If you have Meraki WiFi you can configure Systems Manager to automatically deploy those WiFi settings, without having to manually type them in.