Can any one say easily that what does this code do And why should we put it after the url that we enter???
check out this code to understand https://code.sololearn.com/Wr3tLUsq3w31/?ref=app
It is useful if the image didn't appear. So instead, the text inside alt will appear as an alternative for the failed image. Got it?
its useful in case the viewer is on text only mode or the image simply fails to load. the user will still have an idea what was there