Alt text (alternative text), also known as "alt attributes", "A" alt descriptions", or technically incorrectly as "alt tags, "A" are used within an HTML code to describe the appearance and function of an image on a page. "ALT" is use to display text related to image when image not load. image tags to provide a description of the image
Writing alt text is a high priority whenever you upload an image to your site. Consider making this a standard practice because alt text is relatively simple to implement and stands to impact your SEO for a long time.