Facebook can also be a powerful job-search tool, despite the widely held belief that it's simply a forum for people to communicate about our personal lives. Your "friends" on the world's largest social network are probably some of your closest allies, and such people are likely to go out of their way to help you by alerting you to openings and introducing you to high-value contacts, Morgan said.
If you want to let only certain Facebook "friends" know that you are looking for a new job, you can send private messages through the site, as opposed to posting that information on your page. Your contacts on Facebook, said Morgan, are typically "people who really want to help you and know you best of all."
Read MoreHead west for work: Study
Some companies use Facebook and other such sites to roll out job listings in order to give users of social media first crack at those opportunities. Of course, employers also use social media to vet job candidates for both qualifications and cultural fit.
Job-search experts say it's OK to let a little of your personality shine through in your social media activities, but political rants, copious spelling mistakes, bad grammar and the regular use of profanities are the types of things that can work against you.
"You shouldn't post something unless you are really sure you want everyone to see it," said job coach Smith-Proulx. "Some recruiters specialize in digging up what we call digital dirt."