The '/24' subnet mask is mostly used because most of the networks take the address 255.255.255.0 as the mask and the total of 1's in the address is 24, its significance is that it makes it easier to configure networks.
In networking, the /24 denotes that the first 24 bits of the IP address are reserved for the network, leaving 8 bits for device addresses. This configuration strikes a balance between accommodating a reasonable number of devices and efficiently utilizing IP addresses. With 8 bits for device addresses, there are 2^8 = 256 possible unique addresses within the subnet. It is a practical choice for many local networks where a moderate number of devices need to connect without wasting IP addresses on a larger scale.
