Alt text helps translate a visual UI into a text-based UI. Alt text is a short label that is up to 125 characters embedded in the code describing an image for visually impaired users. There is no need to add text stating that the UI is an "image of" or "picture of" since alt text is only used for images. A screen reader will read the text aloud in place of the image. Alt text also appears in place of the image if the original image fails to load.