Samba is a free software suite that allows sharing files, printers, and other resources between Windows and Unix-like operating systems. It uses the Server Message Block (SMB) protocol to provide file and printer sharing on networks. Samba supports TCP/IP and can integrate Windows clients with Unix/Linux file servers, allowing interoperability between the different operating systems on a network. It is widely used in small office/home office (SOHO) networks and larger enterprise networks to share files and printers.