alt attribute with text describing the purpose of the link.
The engine scans the page for
<img> elements that are children an
<a> element that contains no text, and checks their
Assistive technologies, such as screen readers, rely on alternative text (alt text) to relay important information to the user. An link with no text content and only an image with no description does not provide sufficent information to the assistive technology user.
<a href="#example"> <img src="image.png" alt="Example"/> </a>