Despite reading pages upon pages about the and tags I really don\'t understand how to apply them to my site.
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In the HTML5 standard, the <"article"> element defines a complete, self-contained block of related elements.
The <"section"> element is defined as a block of related elements.
Can we use the definitions to decide how to nest elements? No, we cannot!
On the Internet, you will find HTML pages with <"section"> elements containing <"article"> elements, and <"article"> elements containing <"sections"> elements.
You will also find pages with <"section"> elements containing elements, and elements containing <"article"> elements.
Right From : http://www.w3schools.com/html/html5_semantic_elements.asp