Silos are necessary in companies. They provide the structure that allows companies to work. Every company is split into divisions, departments, or groups, such as sales, technology, and finance. This structure allows expertise in different areas. In companies, Silos tend to be places where information, focus (another word for choosing priorities), and control flow up and down. But company Silos also cause problems—that same structure prevents the flow of information, focus, and control outward. And in order for a company to work efficiently, decisions need to be made across Silos.