Samba is an open source software suite that allows file and print services to be shared between Windows and Unix/Linux machines on a network. It runs on Unix/Linux servers but provides services that Windows clients can access as if they were connecting to a Windows file/print server. Samba allows directories and printers to be shared across platforms, supports user authentication, and enables interoperability between Windows, Unix/Linux, and Macintosh networks using the Server Message Block (SMB) protocol.