Div and Span html tags difference

Div: We can define a section and apply CSS Styles.
Span: We can define an element or area of a section and we can apply CSS Styles.
Refer:
http://www.slideshare.net/biswadip/span-and-div-tags-in-html
http://www.w3schools.com/tags/tryit.asp?filename=tryhtml_span