A broadcast address is a special IP address used to send data to all devices within a subnet at the same time.
Instead of sending a packet to one device, the network delivers it to everyone in that subnet. Suppose your subnet is: 192.168.1.0/24 Broadcast address → 192.168.1.255
Subnets are used to divide a larger IP network into smaller, manageable networks. They help with organization, performance, security, and efficient use of IP addresses.