Buying bedding?! oblige please!? I'm buying a bedding from PBteen, and I need some help. Can...

I'm buying a bedding from PBteen, and I need some help. Can someone let somebody know me the differences between and what is;

-duvet cover and sham
-cover
-sham
-duvet insert [such as; standard duvet insert, luxury down duvet insert, and a supreme down duvet insert]

thanks so much for helping me out...i couldn't be happier if you answered! =)
Where can i find bedding similar to this!!?
Answers:    The duvet segment of the question is tough because people use different name for the same thing. A duvet is if truth be told the cover you put over a comforter-the white ones usually...down or down alternative ones. They are often called duvet covers so it can be confusing. So comforters are the white bedding and also the attractive print bedding that most people are used to. What you are calling the insert is a white comforter(as I said above). A sham is a patterned pillow cover-usually matches duvet or comforter-that you put over extra regular pillows. Shams often come as quantity of a bedding set. I hope I didn't make you more confused...when I was shopping online for bedding it took me awhile to integer out what the websites were calling things. Good luck-hope you find something you love!
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a Duvet Cover is something that you slip a comforter into or some insert which is also an answer to the Duvet insert..its basically a comforter.
a nouns is a decorative pillow cover with a frilly outskirts or some decorative embellishment. A standard pillow cover is simply that...A sham would sit underneath the Standard pillow. Only entail that if you want to have two pillows. You don't typically sleep on the sham..its purely for decoration but its not to say that you can not sleep on it. Just the average individual does not.