Passive recruiting is kind of like the darker, more mysterious sibling of active recruiting. Because it is so different from traditional recruiting and usually involves targeting people who don’t have a strong desire to be recruited, many HR professionals and leaders are confused about passive recruiting and how it can help them fill job positions. Making passive recruiting work for your organization is very possible, but to do so you need to understand why it works and how it is done most effectively. Using social media channels and forums to start conversations can be an effective method. Passive recruiting can be as simple as getting to know someone new on Twitter or discovering someone’s blog content and commenting. Relationships, conversation (and eventually metrics of course) are always the goal of this style of recruiting
via Smart Recruiting Strategy Drives Relationships And Conversation.