This is a paragraph. Do not use text underlining for emphasis on the web. I am just suggesting that this is important. That styling usually denotes a link and may, therefore, create confusion. Curious how links look? Here is one to Wikipedia just for your info.
A code block:1
Just a heading 2
Use section headings to demarcate the thematic sections of your text. Do not use any heading tag on the basis of its font size or other features. Bear in mind that your article is also read by machines. It is important to use HTML tags in a semantically correct way.
Enough of that. Here’s the quote of the day:2
The greatest compliment that was ever paid me was when one asked me what I thought, and attended to my answer.
— Henry David Thoreau
Just a heading 3
For small text, you may opt for the
<small> html tag, which will deliver something like this: This is small text in a semantically correct way.
This probably covers it.