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edited tags; edited title

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edited Jul 13, 2018 at 14:36

unor

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How are the <!DOCTYPE> and <html> tags important for SEO Rankingranking?

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asked Jul 13, 2018 at 5:20

AGamePlayer

How are the <!DOCTYPE> and <html> tags important for SEO Ranking?

I'd like to compare the two sites:

Site A:

<!DOCTYPE html>
<html lang=en_US>
<head>

Site B:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" dir="ltr">
<head>

The differences are:

Site A doesn't have " for tag attributes.
Site A has a very simple !DOCTYPE tag
Site A has a very simple html tag

I'm wondering, are the three factors important for SEO rankings?

seo