Now that we know the basic way to display text in html page,

for instance:

<body>
  <p>I love web dev!</p>
</body>

Emphasis

You can emphasize the text by wrapping it with <em> tag like so:

<p>I love <em>web dev</em> !</p>

By default, your emphasized word will be italic like so:

I love web dev !

Tips: shift + cmd + p to open Command Palette, type wrap, and enter the name of the tag (e.g. em) to wrap selected text with tags.

Yet you can customize your own <em> tag in styling section.

<style>
  em {
    color: red;
    font-style: normal;
  }
</style>

Note: As your code getting larger, you should always keep your html having TEXT ONLY and move all your styling to your CSS file.

Heading

Creating different levels of heading by simply making <h#> tag.

<h1>Heading 1</h1>
<h2>Heading 2</h2>
<h3>Heading 3</h3>

Note: You should ALWAYS use heading based on their hierarchy instead of their size since the size can be changed in CSS.