An intranet is a private network, accessible only to the staff of an organization. It serves a wide variety of purposes, but its core functionality is to help employees work more efficiently, support business processes, provide secure information sharing, enhance internal communication and collaboration. The primary features of an intranet are, centralized document sharing, effortless access from anywhere, active social space for employees, convenient team sites and pages, company-wide announcements and updates, polls, surveys and quizzes, branding and customization, etc.