Splash page?

I find something — for me, it is interesting — in some websites. A splash page. But many of them is just a small image, and sometime I am not sure the use of it (in their site). If it is only an image, or link to the main page, I think it is useless. Wasting time…

I find something — for me, it is interesting — in some websites. A splash page. But many of them is just a small image, and sometime I am not sure the use of it (in their sites). If it is only an image, or link to the main page, I think it is useless. Wasting time…
I just see “click here” link, huge image that should be clicked to enter the first page. What for?
Yeah, I know. You probably do not agree with me. But if you do not have the idea or exact point why the “useless” thing should be there, why is it there?