A good alt text is a brief
and
descriptive summary of an image.
It should provide relevant
details and context of the image.
A bad alt text lacks information,
duplicates existing text, or provides
inaccurate or unrelated descriptions.
Let's look at some examples of good and
bad alt text:
Note
For decorative images, it is recommended
to leave the alt text empty.
Decorative images don't add any information
to the page content and are meant to be
ignored by screen readers.