Twitter is a real-time short messaging service that works over multiple networks and devices. In countries all around the world, people follow the sources most relevant to them and access information via Twitter as it happens—from breaking world news to updates from friends. |
Facebook's mission is to give people the power to share and make the world more open and connected. Millions of people use Facebook everyday to keep up with friends, upload an unlimited number of photos, share links and videos, and learn more about the people they meet. |
LinkedIn is an interconnected network of experienced professionals from around the world, representing 170 industries and 200 countries. Find, be introduced to, and collaborate with qualified professionals that you need to work with to accomplish your goals. |
YouTube is a video sharing Web site on which users can upload, share, and view videos. It’s where you will find a wide variety of user-generated video content, including movie clips, TV clips, and music videos, as well as amateur content such as video blogging and short original videos. |