Important for SEO as it allows a description of the picture. This is vital for a number of factors
Alt text isn’t usually displayed to the end user but when it is – it’s because the graphic was undeliverable or in a browser that doesn’t display graphics.
Allows Google to ‘read’ your images and helps them to appear in google images.
Special web browsers for visually challenged individuals rely on alt text to make the image accessible to the users.
