Make decorative images invisible to assistive technologies
Make sure assistive technologies can safely ignore images that convey no information
Images that are purely decorative in nature or that do not convey any information are often considered irrelevant to those who cannot see them. To help users of assistive technologies focus on content that truly matters, these images are usually better off being ignored altogether.
To do this, simply provide such images with a null ALT attribute value (alt=””). Avoid other describing mechanisms, such as TITLE attributes or aria-label properties. Better yet, make sure decorative images are embedded as background images instead [...]