This document provides an overview of Facebook, including what it is, its history, features, and how to use it for marketing purposes. It begins by explaining that Facebook is a social networking portal where users can interact with friends, share photos and videos, and organize communities. It then discusses Facebook's founding in 2004 and growth since. The remainder of the document outlines various Facebook features and provides steps for businesses to develop a marketing strategy on Facebook, including creating a page, engaging users with different types of content, using ads and plugins, and promoting the page.