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Are there any benefits to omitting the closing body and html tags?
Why is the google.com homepage missing the closing body and html tags?
edit - with regards to bandwidth, it's an extremely small amount, really. Say 10 million hits @ roughly 10 bytes saved ~ 100 mb only... Are there reasons other than bandwidth?
edit 2 - and nope, google (yahoo, microsoft, and others) are not w3-validator compliant... when it comes to bandwidth-saving en mass vs w3-compliance, I guess the latter's good for the sacrificing?
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In HTML 5 it is not mandatory to include a <body> tag inside the HTML document but in previous versions(4.0. 1) it was mandatory to include it. The tags like <div>, <p> or <a> which are generally contained inside body will also work fine without the <body> tag or outside the <body> tag.
Not closing tags can lead to browser incompatibilities and improperly rendered pages. That alone should be enough reason to properly close your tags.
Should Optional HTML Tags be Closed? Code with closing tags is much more readable and easy to follow. It is much easier to visually inspect a page with well laid out markup. Working with this markup is easier for developers.
Think of how many times that page is served every day. Even small reductions in size can be significant at that volume of traffic.
(Although I work for Google, please don't treat this as an "official answer from Google" - it's a guess, but an educated one.)
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