By clicking on that banner, you will be redirected to The Hunger Site. By just visiting that site, you will be allowing them to donate another portion of food to the hungry. This works through paid per view advertisements. They feed people in deep poverty around the world as well as needy families in the US that have been effected by natural disasters. So go ahead, click on it. I have their banner on my sidebar, so click every day if you think of it.
If you think this is a hoax charity, see what snopes says about it, then, please, donate your click. You can click from the snopes' link as well.