External CSS:

This page references an external style sheet which is best for changing the look of an entire site with one change to the single external style sheet document. Notice how the paragraph, h1, h2, and h3 tags look different from the inline style page which doesn't specify them to look a certain way? The usual header is gray in this page as this page references a different external style sheet other than those within the Themes.

Hello this is the h1 tag style

This is an h2 tag style

This is a style for all h3 header tags

This is a line of text that will include a strike inline style which overrides the p tag style for all words after this one. Strike, strike, strike, strike.

This Paragraph contains an inline style that makes it appear to be all caps with red text And As OverRides the External Style sheet as it did with the Embedded Style.