Alternative text (alt text) allows screen readers to capture the description of an object and read it aloud, providing aid for those with visual impairments. Here’s how to add alt text to an object in Word.
In Word, you can add alt text to some objects, but not others. You can add alt text to images, shapes, screenshots, icons, 3D models, and even text boxes. You cannot add alt-text to SmartArt or charts.