<p>Normal text.</p>

<p>Text with a<br/>
line break.</p>

<strong>Bold text</strong>

<em>Emphasized text</em>

<h1>Big text</h1>

<a href="https://google.com">here's a link</a>

<button type="button">
Just a button!

<button type="button"
onclick="alert('You are pretty neat c:')">
Here's a button with a message!
</button>

Embed an image:
<img src="https://i.imgur.com/kjoH9Bp.gif" />

Embed a YouTube video
<iframe src="https://www.youtube.com/embed/80_v0pXheI8"></iframe>