HTML coding and the placement in your Document
Proper HTML placement aside here, 
You can get the page display flow to look rather nice,
it DOES definitely make that difference where the HTML
code is implemented in your Document.
You can almost control the way a page downloads from an ISP
to your P.C.  I say almost because you can write that `killer'
page that not only displays all your code correctly, and in
the striking manner you intended. Then it all falls apart !
You add that quick four lines to include a swell new feature
or graphic.  This changes the way your browser and ISP
download the page entirely !  Not only do your Graphics and text not
get presented correctly or in the correct order or in a fluid manner,
The browser might wait until the entire download to interpret your
HTML and display your page,   none of this layered presentation.
Internet death starts creeping in...
 Keeping you and your intended audience looking at a blank screen,
getting ready to click the back button or just go somewhere else.
 The very same page you coded and tested on a local P.C. might just
be the HTML page from Hell ! once you publish it on the ISP. (any ISP).
There is a way to code for speed, over and above the sheer quantity
of text and HTML tags.  There is a way to code for presentation, as
the page unfolds before your audience.  You can even account for,
and code using all the positive methods of displaying a page and
arrive at TOTAL BONKERS! once you publish it on your ISP!! -
You log back in to check out your latest creation of HTML artwork and
nothing displays, zip, nada.  Was it those tables you placed above those
two ocx controls ?  maybe....
But hey! It sure looks good and fast on your local P.C. 
How about the HTML Page that suddenly only displays the text and hangs
on the first of twenty `drive home the Point making' `killer' graphics
leaving your audience with mere text - that was supposed to be highlighted
and emphasized with `brought home the point' graphics !! 

Where am I going with this ?   Nowhere really, 
 just a little more to HTML than view / source   I gather.