Why do you use alt="" in the image tag ?

Answer 1

The alt attribute provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).

http://www.w3schools.com/tags/att_img_alt.asp

Answer 2

If the image does not load because of the internet connection or the file does not exist, the text inside the alt will show up.

Answer 3

the alt attribute is used to display a text in the event that the image cannot be displayed in the browser

Answer 4

Use alt="" if the image is only for decoration