LONDON -- In this edition, Motley Fool editor Sam Robson asks Motley Fool Share Advisor senior analyst Nate Weisshaar about the power of social media and whether social-media companies are worth having in your portfolio. Under scrutiny today are Facebook (NASDAQ:FB)LinkedIn (NYSE:LNKD), and Rightmove (LSE:RMV).

Investing is by no means easy in today's uncertain economy. That's why we've published "Top Sectors for 2012" -- our guide to three favorable industries. This free report will be dispatched immediately to your inbox.

Neither Nate nor Sam own shares in any of the companies mentioned. The Motley Fool owns shares of Facebook and LinkedIn. Motley Fool newsletter services recommend Facebook and LinkedIn. The Motley Fool has a disclosure policy.