Image Alt Tags are "alternative text" for an image . Alt tags are used to describe the image or what the image is representing. But what is it important for.
Image alt tags are relevant for two main reasons. The first is that they help to improve the CTR(click- through- rate) of your images. It is because if your images have relevant and interesting alt tags, users are more likely to click on them. This will result in them visiting your website and potentially buying something.