Summary
Use the img tag to add an image to a page.
Situation
You want to put an image on a page.
Action
Suppose you want this:

Here's the code:
- <h1>Happiness</h1>
- <p>What makes people happy?</p>
- <p> <img src="rosie1.jpg" alt="A doggo"> </p>
img shows the image. src gives the URL of the image file. alt gives a text alternative when the image can't be seen. It also influences the page's search ranking.