HTML Language to highlight letters on a website -

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is better use strong or h1 h6 bring out letters on website? have seen strong taught use h1 through h6. what's difference?

the <strong> tag phrase tag. defines important text.

<strong>strong text</strong>

the 6 different html headings applied on titles different levels.

<h1>this heading 1</h1> <h2>this heading 2</h2> <h3>this heading 3</h3> <h4>this heading 4</h4> <h5>this heading 5</h5> <h6>this heading 6</h6>

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