The primary goal of scanning a network with tools like MyLanViewer, Nmap, and Advanced IP Scanner is to discover running systems attached to the network.
These tools are primarily used for network discovery purposes, allowing administrators or network security professionals to identify active devices, their IP addresses, and various details about the systems that are currently active on the network. While some tools can also be used to identify vulnerabilities or weaknesses in the systems, that is often a secondary function rather than the primary objective of the scanning activity.