What is the function of the <span> attribute?

Question

Whilst learning HTML, I came across the <span> tag which was included in a code but didn't make any difference when I ran the code. The code goes thus
<h2><span>About me</span></h2>
With or without the span tag, the result is the same so why do we need it, please?

Answer 1

It is used when you want to style with css.

Answer 2

https://code.sololearn.com/WwLpwJetzg3f/?ref=app