VLANs is used for grouping of devices on different LANs which are also in different physical locations which can communicate with each other as if they are on the same physical LAN segment. This allows us to confine broadcast traffic for this workgroup to just those devices that need to see it, and reduce traffic to the rest of the network. There is an increased connection speed due to the elimination of latency.
Advantages of VLAN
Limitations of VLAN