Facebook and LinkedIn are handy for posting “updates&#. Facebook, LinkedIn, and Twitter are a nice way to share pictures of work in progress, links, pictures from open houses, and other day-to-day information. Invite a few people at a time to become “friends&# or “linkedin&#. Some people choose to use LinkedIn for professional networks and Facebook for personal networks. Whoever you are – as a company, as a person – sites like Facebook and LinkedIn make it easy to put your stake in the ground, say what you believe, share what you know.