<Heading tags>
Heading tag is used to display the heading or the main topic on the web page. This tag varies from H1 to H6. This is a container tag. The heading tag
<H1> shows the heading with the largest font size. As you increase the number in the heading tag, the font size goes down as shown in the example given below :
<H1> This text is in largest font i.e. H1 font </H1>
<H2> This text is in largest font i.e. H2 font</H2>
<H3>This text is in medium large font i.e. H3 font</H3>
<H4>This text is in medium small font i.e. H4 font</H4>
<H5>This text is in smaller font i.e. H5 fon</H5>
<H6>This text is in smallest font i.e. H6 font</H6>
The above code produces the following output :

We can see from the output that the size of the font keeps decreasing as one increases the number in the heading tag.