What is difference between a switch and a managed switch?

 I understand the key difference between a managed and unmanaged switch is the ability to configure the switch and to prioritize  LAN traffic to ensure that the most important information.Managed switches provide all the features of an unmanaged switch and provide the ability to configure, manage, and monitor your LAN. And this gives you greater control over how data travels over the network and who has access to it.  Also, managed switches use protocols such as the Simple Network Management Protocol, or what we call SNMP, for monitoring the devices on the network. SNMP is a protocol that facilitates the exchange of management information between network devices. SNMP queries can determine the health of the network or the status
 of a particular device.