Try it Live

<!DOCTYPE html>
<html>
<body>
   <h1> Highest Level Heading (Heading 1) </h1>
   <h2> Second Highest Level Heading (Heading 2) </h2>
   <h3> Third Highest Level Heading (Heading 3) </h3>
   <h4> Fourth Highest Level Heading (Heading 4) </h4>
   <h5> Fifth Highest Level Heading (Heading 5) </h5>
   <h6> Lowest Level Heading (Heading 6) </h6>

<h2> When is heading tag used?</h2>
        Heading tags defines heading and subheadings for particular topics. For example, if you are explaining about “BIRDS”
   <h1>BIRDS</h1>
   
   <h2>About Birds</h2>
   <p>A is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text.</p>
   
   <h3>Bird1</h3>
   <p> Lorem Ipsum has been the industry's standard dummy text ever since the 1500s when an unknown printer </p>
   
   <h4> Characteristics of Birds</h4>
        Feathers.
        Wings. 
        Beak. 
        Eggs.
   
   <h5>Feathers</h5>
    Feathers is made of keratin, the same substance that forms hair and nails in other animals and is highly modified scales. 
   
   <h5>wings</h5>
   Birds have wings to fly, but all birds will not fly
   
   <h6>conclusion</h6>
   save birds
</body>
</html>

​x
 
<!DOCTYPE html>
<html>
<body>
   <h1> Highest Level Heading (Heading 1) </h1>
   <h2> Second Highest Level Heading (Heading 2) </h2>
   <h3> Third Highest Level Heading (Heading 3) </h3>
   <h4> Fourth Highest Level Heading (Heading 4) </h4>
   <h5> Fifth Highest Level Heading (Heading 5) </h5>
   <h6> Lowest Level Heading (Heading 6) </h6>
​
   <h2> When is heading tag used?</h2>
        Heading tags defines heading and subheadings for particular topics. For example, if you are explaining about “BIRDS”
   <h1>BIRDS</h1>
   
   <h2>About Birds</h2>
   <p>A is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text.</p>
   
   <h3>Bird1</h3>
   <p> Lorem Ipsum has been the industry's standard dummy text ever since the 1500s when an unknown printer </p>
   
   <h4> Characteristics of Birds</h4>
        Feathers.
        Wings. 
        Beak. 
        Eggs.
   
   <h5>Feathers</h5>
    Feathers is made of keratin, the same substance that forms hair and nails in other animals and is highly modified scales. 
   
   <h5>wings</h5>
   Birds have wings to fly, but all birds will not fly
   
   <h6>conclusion</h6>
   save birds
</body>
</html>
​