For example, if I wrap my content with <div>
tags (for no reason, just for arguments sake), would that cause a difference to search engines? Does thinner markup improve SEO?
<body>
<div>
<div>
<div>
<main>
<p>Text text text text text...</p>
</main>
</div>
</div>
</div>
</body>
versus
<body>
<div>
<main>
<p>Text text text text text...</p>
</main>
</div>
</body>
versus
<body>
<main>
<p>Text text text text text...</p>
</main>
</body>
From an SEO standpoint, are these all equal or not?