Click this button to optimize your Z-Wave network. This can also be done automatically by enabling Z-Health™ at the bottom of the Manage Z-Wave Interfaces page. Optimizing a single node is the act of the controller telling the node to discover which other nodes are neighbors to it. This is done when a node is added to the network, but changes in your home, your Z-Wave network, or even the atmosphere can change the signal strength of other nodes and whether they are still considered to be a neighbor to other nodes. Since the node being optimized has to wait for responses from all of the nodes around it, this process can take some time. The Optimize Network button performs an optimization on ALL of the nodes in the network that can be optimized.
If a node is not a "listening" node, which means it does not always have its radio turned on to hear Z-Wave signals, then it cannot be optimized. This typically applies to battery operated devices which turn on their radio only at certain times for short periods of time. Since these devices are not listening all the time, they do not typically participate in routing, so optimizing these types of nodes typically benefit only the node itself, and not the entire network. To optimize nodes like this, go to the device properties page for the node, wake up the node using whatever method is available as per the manufacturer's instructions, and then click the Optimize button to optimize just that node.