what is difference between <em> and<i>

Question

there is no difference in view
but in code

Answer 1

<em> was introduced for coding in mobile devices, some devices can't display 'italic' text, but can display text in some other 'emphasised' way, so it's much more safe and professional to use the correct way, <em>.

Answer 2

<i> define italic , respectively, while <em> is when the text is more "important"