What does SOLOLEARN mean by this text?

Question

"Browsers display <strong> as <b>, and <em> as <i>.
However, the meanings of these tags differ: <b> and <i> define bold and italic text, respectively, while <strong> and <em> indicate that the text is 'important'."

What does this mean? Are saying that <strong> and <em> are more important than <b> and <i>? If so why?

Answer 1

Strong and b is used to bold the text. Whereas em and i are used to make text italic. And these are newly added in html5