1What is the use of using alternative text in image mapping in HTML

Answer 1

Let suppose, because of some problem, ur image fails to load. In that case, alternative text will give an idea to the users about ur image like what that image was about.

Answer 2

The alt attribute specifies an alternate text for an image, if the image cannot be displayed.

You can visit :
https://www.w3schools.com/tags/att_img_alt.asp

Answer 3

Thanks