Image hosting what is it?

My hosting provider does not allow me to put images which are linked on other pages(my guestbook),and I don’t want to signe up for bigger space beaucose is too expensive for me.
I’ve heard of image hosting so I’m interested what is thet, and whether it will help me?

If I understand correctly. You’re looking for an explanation of what it is that image hosting. There are a large number of web sites / hosting, which allows you to upload images. Some are free and some must pay. They give you space on their server where you do upload images.