Whilst removing superfluous markup elements represents only a tiny data saving, every little help!
Saving your time and code with HTML5
The first line of any HTML document starts with the Doctype (Document Type Declaration). This is the part that, if we are honest, gets added automatically by our code editor of choice or we can paste it from an existing boilerplate (nobody really enters the full HTML 4.01 Doctype out, do they?) Before HTML5, the Doctype for a standard HTML 4.01 page would have looked as follows:
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN” “http://www.w3.org/TR/html4/loose.dtd”>
Now, with HTML5, as follows: