Some browsers are non-graphical. They cannot display images. Also many people
choose not to load images because they take too long. In order to tell people
what they are missing or cannot see, add a text description. To do use the
optional ALT attribute with the syntax of the <IMG> tag.
Here is the syntax of the <IMG> tag with ALT:
<IMG SRC="URL" ALT="alternate text information">
What other attributes does the <IMG> tag have?