wot is 'alt' here ?
If your image is deleted this alt text will be displayed
for example try this
<img href = "~/a.jpeg" alt="What is alt"/>
'alt' - alternative Text
if the image control does finds image source then it displays the 'alt' text in the image place.
Thanks & Regards
if ur image control does not find any image then what should be alternate text for it..This text shold be written in alternate text..