In looking for a job, it's not what you know, but it's also not "who you know." Rather, the key may be who people that you know. This is the essence of the sociological insight first expressed in a research paper entitled:

The correct answer is "The Strength of Weak Ties"

In the networks of Strong Ties there is a common identity, and there we seek  references for decision making (relationships with a high level of credibility and influence);  Weak Ties networks are important because they connect us with various groups, breaking  the configuration of clusters, and functioning as bridges through which innovations circulate.  The Internet connects more often and sometimes more intensely, the relationships of Ties  Weak and Strong Ties, preserving and expanding Granovetter's concepts.

the answer would be in this answer. someone already asked the question.  

it's