What is the point or advantages of connecting with other people on LinkedIn?

LinkedIn Connections
There are two main approaches people have when connecting with others on LinkedIn.
Is to connect with only those you know well Is to connect with everyone Sure there are cases in between, but for the most part those are the two main strategies people use.
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There was some recent discussion about a Pro Blogger guest article I did on using LinkedIn to drive traffic back to you website, and the main rea...