what does <hr> in html mean

Code Example 1

<h1>HTML</h1>

 <p>HTML is a language for describing web pages.....</p>


 <hr>

<h1>CSS</h1>

 <p>CSS defines how to display HTML elements.....</p>

Code Example 2

<p>HTML is a language for describing web pages.....</p>

<!--the hr tag stands for horizontal rule and will make a line across your page at that point-->
 <hr>

 <p>CSS defines how to display HTML elements.....</p>