Sometimes to make the code neat and understandable we add comments to name each section so we know where to go instead of searching a lot. HTML does not show the comments on the browser, This will not make sense now but in the example you will understand.
To add a comment you need to type the following: <!----> . Between the two hyphens: <!--Comment goes here-->
Examples:
Without comment:
<p> Its so sunny today.</p>
<p>HTML is an awesome language</p>
<p>Speed of sound is 342m/secs</p>
In the above sentences we see that the 1st sentence talks about the weather, then the next sentence talks about HTML and the last sentence talks tells the speed of sound. But there is not flow in these sentences and hence it looks very confusing.
With comments:
Hi!
<p>Its so sunny today.</p>
<p>HTML is an awesome language</p>
<p>Speed of sound is 342m/sec</p>
Now if we look at the above sentences it looks more clean and we can figure out what these sentences are about.