The use of social networks or social media for recruitment purposes provides employers with substantial prospects for searching and recruiting potential candidates. Since social media and online resources are the most available and effective tools in the 21st century, they are more convenient and appropriate to use for recruiting purposes these days. But because there are numerous benefits, there are also a couple of significant challenges for employers if they want to undergo screening or background checks or check employees' work references. While using social networks to search and select the right candidates, employers face some restrictions, occasionally, while online screening is based on data sourced through social network content, it can make a wrong decision. Due to potentially discriminatory hiring rates, the practice of social network screening and background checks by recruiters is declining. This may lead to legal action by employees as there are currently no clear legal provisions. Therefore there should be clear policies and practices to be developed on how much social network information organizations and employers can use during the hiring process. The limitations and solutions to this issue have been recognized and foreseen for some time and therefore this setback does not represent an obstacle for companies and employers to stop moving forward with a tool as broad and valuable as social networking. WHAT'S OUTSIDE? OR THE THREE BIG SOCIAL MEDIA RESOURCES The three big social media platforms, most popular and therefore effective and which usually do not require investments, are Facebook, a social network service, founded on February 4, 2004 by Mark Zuckerberg with his companions college room and colleagues. Harvard University students. LinkedIn, which is a business-oriented social networking service. It was launched on May 5, 2003 and is mainly used for professional networking. And the micro blogging service, called Twitter "that allows users to send and read short 140-character text messages, called "tweets." These major social platforms are very successful among a wide range of generations and have become an integral part than so in many people's lives. Therefore they are more convenient and handy to use, also thanks to the use of advanced mobile applications and high-speed Internet access, wherever you work in the office or participate in a marathon Although Facebook was originally created for personal communication only, it was eventually transformed into a tool used for business and professional use as well. It allows users and potential employers to create a job brand, search for possible candidates and post jobs work available.