What does the tag <em></em> do, please?

Answer 1

The <em> tag is a phrase tag. It renders as emphasized text.

Example:
<em>Emphasized text</em>

Tip: This tag is not deprecated, but it is possible to achieve richer effect with CSS.

- Dumitru
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Answer 2

The <em> tag is a phrase tag. It renders as emphasized text. And in browsers this tagged text shown as italic.

Answer 3

it is an emphasized text. similar to italic <i>

Answer 4

thanks :-)