What is <em>?

Answer 1

'em' stands for emphasized. The Visual effect is that the text will be italic. the <i> tag does the same task, but the difference is that the <em> tag has more semantic value.
In other words:
Both tags make the text italic but <em> adds extra semantic value.
An other example is:
<strong> and <b> tag.
See this link: https://developer.mozilla.org/en/docs/Web/HTML/Element/em

Answer 2

this code will emphasize your text

Answer 3

makes the text italic :)

Answer 4

An emphasizing tag for texts. It is similar to the <i> tag which italicizes the text.

Answer 5

it shows that a text is important

Answer 6

<em> it shows italic

Answer 7

<em> it an emphasis tag used to make a text italic