DIV
The div element has no special meaning at all. It represents its
children. It can be used with the class, lang, and title attributes to
mark up semantics common to a group of consecutive elements.
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Section :
The section element represents a generic section of a document or
application. A section, in this context, is a thematic grouping of
content, typically with a heading.
Examples of sections would be chapters, the various tabbed pages in a
tabbed dialog box, or the numbered sections of a thesis. A Web site's
home page could be split into sections for an introduction, news
items, and contact information.
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