Please help me with vertical navbars!!!?

Hello. I'm trying to set a vertical navbar in my website but the information I can get from the web isn't clear enough. Could you help me sort this out? I need just some explanations about these css codes you find while googling for "Vertical Navbar using UL LI | Stunning Mesh" (the first... show more Hello. I'm trying to set a vertical navbar in my website but the information I can get from the web isn't clear enough. Could you help me sort this out? I need just some explanations about these css codes you find while googling for "Vertical Navbar using UL LI | Stunning Mesh" (the first result).
I would really appreciate your help. 10 points guranteed.
Thank You.
Update: OK I have some basics in css but I just needed some help explaining the code because that's what I'm missing all over the web.(P.S. I'm learning css online hehehe)
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