An LNK file is a file extension used by Microsoft Windows to create a shortcut or a pointer to another file, folder, or executable program. These files are not the actual data files themselves but rather small files containing metadata that directs the operating system to the location of the target item. The structure of an LNK file includes several components, such as the Shell Link Header, Link Target ID List (optional), Link Info (containing local and network paths), String Data (including description, icon location, and working directory), and optional extra data blocks. When a user double-clicks an LNK file, the Windows Shell reads the stored path information and executes or opens the linked item. LNK files are fundamental to the Windows user interface, enabling the creation of desktop icons, Start Menu entries, and quick access links without duplicating the original data, thereby saving disk space and simplifying navigation.