What do you mean by "strong and em are important"?

Question

What's the difference both strong and b looks same and likewise with em and i?

Answer 1

strong and b
b is to make the text bold
strong is used for search engines to recognise important text

same for em and i

Answer 2

^_^ → https://stackoverflow.com/questions/271743/whats-the-difference-between-b-and-strong-i-and-em

Answer 3

both <b>and<strong>will make the text written in bold style but the difference is that <strong>has a syntax meaning it gives importance to the text and it helps with search engines.
the same concept with <I>and<em> both make the text italic but <em> has a syntax meaning