What is the purpose of "GitHub" and "Source Control"?

[, LLC;528953]
1.) What does “Grab the source on GitHub” mean and how does it benefit me in working on a project that I’m basically, at this point, familiarizing myself with in my learning process?
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you do NOT need the source code and you never will, ignore that section.

[, LLC;528953]

2.) What is the purpose of “Connecting to source control” and which option do I choose: “Subversion, Perforce or Git (beta version)”? And is “Git (beta version)” the same as “GitHub”? Do I need to connect to one of the above aforementioned now? Why/ Why not?
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darthviper107 answer